diff --git a/.travis.yml b/.travis.yml
index e762b944..a36373b4 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -19,6 +19,8 @@ before_install:
  # Required for coverage.
  - go get golang.org/x/tools/cmd/cover
  - go get github.com/mattn/goveralls
+ # Required for dot parser checks.
+ - go get github.com/goccmack/gocc
 
 go_import_path: gonum.org/v1/gonum
 
diff --git a/.travis/check-generate.sh b/.travis/check-generate.sh
index 9a95d019..bdfc7abd 100755
--- a/.travis/check-generate.sh
+++ b/.travis/check-generate.sh
@@ -2,6 +2,7 @@
 
 go generate gonum.org/v1/gonum/blas/gonum
 go generate gonum.org/v1/gonum/unit
+go generate gonum.org/v1/gonum/graph/formats/dot
 if [ -n "$(git diff)" ]; then
 	exit 1
 fi
diff --git a/graph/formats/dot/dot.go b/graph/formats/dot/dot.go
index 984515e1..07967c7f 100644
--- a/graph/formats/dot/dot.go
+++ b/graph/formats/dot/dot.go
@@ -8,6 +8,8 @@
 // This file is made available under a Creative Commons CC0 1.0
 // Universal Public Domain Dedication.
 
+//go:generate ./makeinternal.bash
+
 // Package dot implements a parser for Graphviz DOT files.
 package dot // import "gonum.org/v1/gonum/graph/formats/dot"
 
diff --git a/graph/formats/dot/internal/lexer/lexer.go b/graph/formats/dot/internal/lexer/lexer.go
index 1b8b1c63..2e907952 100644
--- a/graph/formats/dot/internal/lexer/lexer.go
+++ b/graph/formats/dot/internal/lexer/lexer.go
@@ -53,9 +53,7 @@ func NewLexerFile(fpath string) (*Lexer, error) {
 }
 
 func (this *Lexer) Scan() (tok *token.Token) {
-
 	// fmt.Printf("Lexer.Scan() pos=%d\n", this.pos)
-
 	tok = new(token.Token)
 	if this.pos >= len(this.src) {
 		tok.Type = token.EOF
@@ -66,16 +64,13 @@ func (this *Lexer) Scan() (tok *token.Token) {
 	tok.Type = token.INVALID
 	state, rune1, size := 0, rune(-1), 0
 	for state != -1 {
-
 		// fmt.Printf("\tpos=%d, line=%d, col=%d, state=%d\n", this.pos, this.line, this.column, state)
-
 		if this.pos >= len(this.src) {
 			rune1 = -1
 		} else {
 			rune1, size = utf8.DecodeRune(this.src[this.pos:])
 			this.pos += size
 		}
-
 		// Production start
 		if rune1 != -1 {
 			state = TransTab[state](rune1)
@@ -138,7 +133,6 @@ func (this *Lexer) Scan() (tok *token.Token) {
 		tok.Lit = []byte{}
 	}
 	tok.Pos.Offset, tok.Pos.Line, tok.Pos.Column = start, startLine, startColumn
-
 	// fmt.Printf("Token at %s: %s \"%s\"\n", tok.String(), token.TokMap.Id(tok.Type), tok.Lit)
 
 	return
@@ -151,188 +145,371 @@ func (this *Lexer) Reset() {
 /*
 Lexer symbols:
 0: 'n'
+
 1: 'o'
+
 2: 'd'
+
 3: 'e'
+
 4: 'N'
+
 5: 'o'
+
 6: 'd'
+
 7: 'e'
+
 8: 'N'
+
 9: 'O'
+
 10: 'D'
+
 11: 'E'
+
 12: 'e'
+
 13: 'd'
+
 14: 'g'
+
 15: 'e'
+
 16: 'E'
+
 17: 'd'
+
 18: 'g'
+
 19: 'e'
+
 20: 'E'
+
 21: 'D'
+
 22: 'G'
+
 23: 'E'
+
 24: 'g'
+
 25: 'r'
+
 26: 'a'
+
 27: 'p'
+
 28: 'h'
+
 29: 'G'
+
 30: 'r'
+
 31: 'a'
+
 32: 'p'
+
 33: 'h'
+
 34: 'G'
+
 35: 'R'
+
 36: 'A'
+
 37: 'P'
+
 38: 'H'
+
 39: 'd'
+
 40: 'i'
+
 41: 'g'
+
 42: 'r'
+
 43: 'a'
+
 44: 'p'
+
 45: 'h'
+
 46: 'D'
+
 47: 'i'
+
 48: 'g'
+
 49: 'r'
+
 50: 'a'
+
 51: 'p'
+
 52: 'h'
+
 53: 'd'
+
 54: 'i'
+
 55: 'G'
+
 56: 'r'
+
 57: 'a'
+
 58: 'p'
+
 59: 'h'
+
 60: 'D'
+
 61: 'i'
+
 62: 'G'
+
 63: 'r'
+
 64: 'a'
+
 65: 'p'
+
 66: 'h'
+
 67: 'D'
+
 68: 'I'
+
 69: 'G'
+
 70: 'R'
+
 71: 'A'
+
 72: 'P'
+
 73: 'H'
+
 74: 's'
+
 75: 'u'
+
 76: 'b'
+
 77: 'g'
+
 78: 'r'
+
 79: 'a'
+
 80: 'p'
+
 81: 'h'
+
 82: 'S'
+
 83: 'u'
+
 84: 'b'
+
 85: 'g'
+
 86: 'r'
+
 87: 'a'
+
 88: 'p'
+
 89: 'h'
+
 90: 's'
+
 91: 'u'
+
 92: 'b'
+
 93: 'G'
+
 94: 'r'
+
 95: 'a'
+
 96: 'p'
+
 97: 'h'
+
 98: 'S'
+
 99: 'u'
+
 100: 'b'
+
 101: 'G'
+
 102: 'r'
+
 103: 'a'
+
 104: 'p'
+
 105: 'h'
+
 106: 'S'
+
 107: 'U'
+
 108: 'B'
+
 109: 'G'
+
 110: 'R'
+
 111: 'A'
+
 112: 'P'
+
 113: 'H'
+
 114: 's'
+
 115: 't'
+
 116: 'r'
+
 117: 'i'
+
 118: 'c'
+
 119: 't'
+
 120: 'S'
+
 121: 't'
+
 122: 'r'
+
 123: 'i'
+
 124: 'c'
+
 125: 't'
+
 126: 'S'
+
 127: 'T'
+
 128: 'R'
+
 129: 'I'
+
 130: 'C'
+
 131: 'T'
+
 132: '{'
+
 133: '}'
+
 134: ';'
+
 135: '-'
+
 136: '-'
+
 137: '-'
+
 138: '>'
+
 139: '['
+
 140: ']'
+
 141: ','
+
 142: '='
+
 143: ':'
+
 144: '_'
+
 145: '-'
+
 146: '.'
+
 147: '-'
+
 148: '.'
+
 149: '\'
+
 150: '"'
+
 151: '\'
+
 152: '"'
+
 153: '"'
+
 154: '='
+
 155: '<'
+
 156: '>'
+
 157: '<'
+
 158: '>'
+
 159: '/'
+
 160: '/'
+
 161: '\n'
+
 162: '#'
+
 163: '\n'
+
 164: '/'
+
 165: '*'
+
 166: '*'
+
 167: '*'
+
 168: '/'
+
 169: ' '
+
 170: '\t'
+
 171: '\r'
+
 172: '\n'
+
 173: \u0001-'!'
+
 174: '#'-'['
+
 175: ']'-\u007f
+
 176: 'a'-'z'
+
 177: 'A'-'Z'
+
 178: '0'-'9'
+
 179: \u0080-\ufffc
+
 180: \ufffe-\U0010ffff
+
 181: \u0001-';'
+
 182: '?'-\u00ff
+
 183: .
 
 */
diff --git a/graph/formats/dot/internal/lexer/transitiontable.go b/graph/formats/dot/internal/lexer/transitiontable.go
index 98c1d051..8f8f8393 100644
--- a/graph/formats/dot/internal/lexer/transitiontable.go
+++ b/graph/formats/dot/internal/lexer/transitiontable.go
@@ -20,7 +20,6 @@ transitionTable[s](r) returns the next state.
 type TransitionTable [NumStates]func(rune) int
 
 var TransTab = TransitionTable{
-
 	// S0
 	func(r rune) int {
 		switch {
@@ -108,19 +107,15 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S1
 	func(r rune) int {
 		switch {
-
 		}
 		return NoState
 	},
-
 	// S2
 	func(r rune) int {
 		switch {
@@ -138,31 +133,24 @@ var TransTab = TransitionTable{
 			return 33
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 33
-
 		}
 		return NoState
 	},
-
 	// S3
 	func(r rune) int {
 		switch {
 		case r == 10: // ['\n','\n']
 			return 34
-
 		default:
 			return 3
 		}
-
 	},
-
 	// S4
 	func(r rune) int {
 		switch {
-
 		}
 		return NoState
 	},
-
 	// S5
 	func(r rune) int {
 		switch {
@@ -174,21 +162,17 @@ var TransTab = TransitionTable{
 			return 8
 		case r == 62: // ['>','>']
 			return 36
-
 		}
 		return NoState
 	},
-
 	// S6
 	func(r rune) int {
 		switch {
 		case 48 <= r && r <= 57: // ['0','9']
 			return 37
-
 		}
 		return NoState
 	},
-
 	// S7
 	func(r rune) int {
 		switch {
@@ -196,11 +180,9 @@ var TransTab = TransitionTable{
 			return 38
 		case r == 47: // ['/','/']
 			return 39
-
 		}
 		return NoState
 	},
-
 	// S8
 	func(r rune) int {
 		switch {
@@ -208,27 +190,21 @@ var TransTab = TransitionTable{
 			return 40
 		case 48 <= r && r <= 57: // ['0','9']
 			return 8
-
 		}
 		return NoState
 	},
-
 	// S9
 	func(r rune) int {
 		switch {
-
 		}
 		return NoState
 	},
-
 	// S10
 	func(r rune) int {
 		switch {
-
 		}
 		return NoState
 	},
-
 	// S11
 	func(r rune) int {
 		switch {
@@ -242,19 +218,15 @@ var TransTab = TransitionTable{
 			return 43
 		case 63 <= r && r <= 255: // ['?',\u00ff]
 			return 41
-
 		}
 		return NoState
 	},
-
 	// S12
 	func(r rune) int {
 		switch {
-
 		}
 		return NoState
 	},
-
 	// S13
 	func(r rune) int {
 		switch {
@@ -270,11 +242,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S14
 	func(r rune) int {
 		switch {
@@ -298,11 +268,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S15
 	func(r rune) int {
 		switch {
@@ -326,11 +294,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S16
 	func(r rune) int {
 		switch {
@@ -354,11 +320,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S17
 	func(r rune) int {
 		switch {
@@ -382,11 +346,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S18
 	func(r rune) int {
 		switch {
@@ -414,27 +376,21 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S19
 	func(r rune) int {
 		switch {
-
 		}
 		return NoState
 	},
-
 	// S20
 	func(r rune) int {
 		switch {
-
 		}
 		return NoState
 	},
-
 	// S21
 	func(r rune) int {
 		switch {
@@ -450,11 +406,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S22
 	func(r rune) int {
 		switch {
@@ -474,11 +428,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S23
 	func(r rune) int {
 		switch {
@@ -498,11 +450,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S24
 	func(r rune) int {
 		switch {
@@ -522,11 +472,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S25
 	func(r rune) int {
 		switch {
@@ -546,11 +494,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S26
 	func(r rune) int {
 		switch {
@@ -572,27 +518,21 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S27
 	func(r rune) int {
 		switch {
-
 		}
 		return NoState
 	},
-
 	// S28
 	func(r rune) int {
 		switch {
-
 		}
 		return NoState
 	},
-
 	// S29
 	func(r rune) int {
 		switch {
@@ -608,11 +548,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S30
 	func(r rune) int {
 		switch {
@@ -630,19 +568,15 @@ var TransTab = TransitionTable{
 			return 33
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 33
-
 		}
 		return NoState
 	},
-
 	// S31
 	func(r rune) int {
 		switch {
-
 		}
 		return NoState
 	},
-
 	// S32
 	func(r rune) int {
 		switch {
@@ -660,11 +594,9 @@ var TransTab = TransitionTable{
 			return 65
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 65
-
 		}
 		return NoState
 	},
-
 	// S33
 	func(r rune) int {
 		switch {
@@ -682,79 +614,61 @@ var TransTab = TransitionTable{
 			return 33
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 33
-
 		}
 		return NoState
 	},
-
 	// S34
 	func(r rune) int {
 		switch {
-
 		}
 		return NoState
 	},
-
 	// S35
 	func(r rune) int {
 		switch {
-
 		}
 		return NoState
 	},
-
 	// S36
 	func(r rune) int {
 		switch {
-
 		}
 		return NoState
 	},
-
 	// S37
 	func(r rune) int {
 		switch {
 		case 48 <= r && r <= 57: // ['0','9']
 			return 37
-
 		}
 		return NoState
 	},
-
 	// S38
 	func(r rune) int {
 		switch {
 		case r == 42: // ['*','*']
 			return 66
-
 		default:
 			return 38
 		}
-
 	},
-
 	// S39
 	func(r rune) int {
 		switch {
 		case r == 10: // ['\n','\n']
 			return 34
-
 		default:
 			return 39
 		}
-
 	},
-
 	// S40
 	func(r rune) int {
 		switch {
 		case 48 <= r && r <= 57: // ['0','9']
 			return 67
-
 		}
 		return NoState
 	},
-
 	// S41
 	func(r rune) int {
 		switch {
@@ -768,11 +682,9 @@ var TransTab = TransitionTable{
 			return 43
 		case 63 <= r && r <= 255: // ['?',\u00ff]
 			return 41
-
 		}
 		return NoState
 	},
-
 	// S42
 	func(r rune) int {
 		switch {
@@ -782,19 +694,15 @@ var TransTab = TransitionTable{
 			return 68
 		case 63 <= r && r <= 255: // ['?',\u00ff]
 			return 68
-
 		}
 		return NoState
 	},
-
 	// S43
 	func(r rune) int {
 		switch {
-
 		}
 		return NoState
 	},
-
 	// S44
 	func(r rune) int {
 		switch {
@@ -810,11 +718,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S45
 	func(r rune) int {
 		switch {
@@ -834,11 +740,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S46
 	func(r rune) int {
 		switch {
@@ -862,11 +766,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S47
 	func(r rune) int {
 		switch {
@@ -886,11 +788,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S48
 	func(r rune) int {
 		switch {
@@ -910,11 +810,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S49
 	func(r rune) int {
 		switch {
@@ -932,11 +830,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S50
 	func(r rune) int {
 		switch {
@@ -954,11 +850,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S51
 	func(r rune) int {
 		switch {
@@ -978,11 +872,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S52
 	func(r rune) int {
 		switch {
@@ -1002,11 +894,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S53
 	func(r rune) int {
 		switch {
@@ -1026,11 +916,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S54
 	func(r rune) int {
 		switch {
@@ -1050,11 +938,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S55
 	func(r rune) int {
 		switch {
@@ -1074,11 +960,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S56
 	func(r rune) int {
 		switch {
@@ -1098,11 +982,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S57
 	func(r rune) int {
 		switch {
@@ -1126,11 +1008,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S58
 	func(r rune) int {
 		switch {
@@ -1150,11 +1030,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S59
 	func(r rune) int {
 		switch {
@@ -1172,11 +1050,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S60
 	func(r rune) int {
 		switch {
@@ -1196,11 +1072,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S61
 	func(r rune) int {
 		switch {
@@ -1220,11 +1094,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S62
 	func(r rune) int {
 		switch {
@@ -1244,11 +1116,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S63
 	func(r rune) int {
 		switch {
@@ -1266,11 +1136,9 @@ var TransTab = TransitionTable{
 			return 33
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 33
-
 		}
 		return NoState
 	},
-
 	// S64
 	func(r rune) int {
 		switch {
@@ -1288,11 +1156,9 @@ var TransTab = TransitionTable{
 			return 33
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 33
-
 		}
 		return NoState
 	},
-
 	// S65
 	func(r rune) int {
 		switch {
@@ -1310,11 +1176,9 @@ var TransTab = TransitionTable{
 			return 33
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 33
-
 		}
 		return NoState
 	},
-
 	// S66
 	func(r rune) int {
 		switch {
@@ -1322,23 +1186,18 @@ var TransTab = TransitionTable{
 			return 66
 		case r == 47: // ['/','/']
 			return 89
-
 		default:
 			return 38
 		}
-
 	},
-
 	// S67
 	func(r rune) int {
 		switch {
 		case 48 <= r && r <= 57: // ['0','9']
 			return 67
-
 		}
 		return NoState
 	},
-
 	// S68
 	func(r rune) int {
 		switch {
@@ -1350,11 +1209,9 @@ var TransTab = TransitionTable{
 			return 90
 		case 63 <= r && r <= 255: // ['?',\u00ff]
 			return 68
-
 		}
 		return NoState
 	},
-
 	// S69
 	func(r rune) int {
 		switch {
@@ -1374,11 +1231,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S70
 	func(r rune) int {
 		switch {
@@ -1398,11 +1253,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S71
 	func(r rune) int {
 		switch {
@@ -1422,11 +1275,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S72
 	func(r rune) int {
 		switch {
@@ -1446,11 +1297,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S73
 	func(r rune) int {
 		switch {
@@ -1470,11 +1319,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S74
 	func(r rune) int {
 		switch {
@@ -1494,11 +1341,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S75
 	func(r rune) int {
 		switch {
@@ -1518,11 +1363,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S76
 	func(r rune) int {
 		switch {
@@ -1542,11 +1385,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S77
 	func(r rune) int {
 		switch {
@@ -1566,11 +1407,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S78
 	func(r rune) int {
 		switch {
@@ -1590,11 +1429,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S79
 	func(r rune) int {
 		switch {
@@ -1614,11 +1451,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S80
 	func(r rune) int {
 		switch {
@@ -1638,11 +1473,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S81
 	func(r rune) int {
 		switch {
@@ -1666,11 +1499,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S82
 	func(r rune) int {
 		switch {
@@ -1690,11 +1521,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S83
 	func(r rune) int {
 		switch {
@@ -1714,11 +1543,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S84
 	func(r rune) int {
 		switch {
@@ -1738,11 +1565,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S85
 	func(r rune) int {
 		switch {
@@ -1762,11 +1587,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S86
 	func(r rune) int {
 		switch {
@@ -1786,11 +1609,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S87
 	func(r rune) int {
 		switch {
@@ -1810,11 +1631,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S88
 	func(r rune) int {
 		switch {
@@ -1838,19 +1657,15 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S89
 	func(r rune) int {
 		switch {
-
 		}
 		return NoState
 	},
-
 	// S90
 	func(r rune) int {
 		switch {
@@ -1864,11 +1679,9 @@ var TransTab = TransitionTable{
 			return 43
 		case 63 <= r && r <= 255: // ['?',\u00ff]
 			return 41
-
 		}
 		return NoState
 	},
-
 	// S91
 	func(r rune) int {
 		switch {
@@ -1886,11 +1699,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S92
 	func(r rune) int {
 		switch {
@@ -1908,11 +1719,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S93
 	func(r rune) int {
 		switch {
@@ -1930,11 +1739,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S94
 	func(r rune) int {
 		switch {
@@ -1950,11 +1757,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S95
 	func(r rune) int {
 		switch {
@@ -1974,11 +1779,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S96
 	func(r rune) int {
 		switch {
@@ -1998,11 +1801,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S97
 	func(r rune) int {
 		switch {
@@ -2018,11 +1819,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S98
 	func(r rune) int {
 		switch {
@@ -2042,11 +1841,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S99
 	func(r rune) int {
 		switch {
@@ -2066,11 +1863,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S100
 	func(r rune) int {
 		switch {
@@ -2090,11 +1885,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S101
 	func(r rune) int {
 		switch {
@@ -2114,11 +1907,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S102
 	func(r rune) int {
 		switch {
@@ -2138,11 +1929,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S103
 	func(r rune) int {
 		switch {
@@ -2160,11 +1949,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S104
 	func(r rune) int {
 		switch {
@@ -2182,11 +1969,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S105
 	func(r rune) int {
 		switch {
@@ -2206,11 +1991,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S106
 	func(r rune) int {
 		switch {
@@ -2230,11 +2013,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S107
 	func(r rune) int {
 		switch {
@@ -2254,11 +2035,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S108
 	func(r rune) int {
 		switch {
@@ -2278,11 +2057,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S109
 	func(r rune) int {
 		switch {
@@ -2302,11 +2079,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S110
 	func(r rune) int {
 		switch {
@@ -2326,11 +2101,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S111
 	func(r rune) int {
 		switch {
@@ -2350,11 +2123,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S112
 	func(r rune) int {
 		switch {
@@ -2370,11 +2141,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S113
 	func(r rune) int {
 		switch {
@@ -2394,11 +2163,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S114
 	func(r rune) int {
 		switch {
@@ -2416,11 +2183,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S115
 	func(r rune) int {
 		switch {
@@ -2440,11 +2205,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S116
 	func(r rune) int {
 		switch {
@@ -2462,11 +2225,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S117
 	func(r rune) int {
 		switch {
@@ -2484,11 +2245,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S118
 	func(r rune) int {
 		switch {
@@ -2508,11 +2267,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S119
 	func(r rune) int {
 		switch {
@@ -2532,11 +2289,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S120
 	func(r rune) int {
 		switch {
@@ -2556,11 +2311,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S121
 	func(r rune) int {
 		switch {
@@ -2578,11 +2331,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S122
 	func(r rune) int {
 		switch {
@@ -2600,11 +2351,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S123
 	func(r rune) int {
 		switch {
@@ -2624,11 +2373,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S124
 	func(r rune) int {
 		switch {
@@ -2648,11 +2395,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S125
 	func(r rune) int {
 		switch {
@@ -2672,11 +2417,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S126
 	func(r rune) int {
 		switch {
@@ -2692,11 +2435,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S127
 	func(r rune) int {
 		switch {
@@ -2716,11 +2457,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S128
 	func(r rune) int {
 		switch {
@@ -2740,11 +2479,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S129
 	func(r rune) int {
 		switch {
@@ -2764,11 +2501,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S130
 	func(r rune) int {
 		switch {
@@ -2788,11 +2523,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S131
 	func(r rune) int {
 		switch {
@@ -2812,11 +2545,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S132
 	func(r rune) int {
 		switch {
@@ -2836,11 +2567,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S133
 	func(r rune) int {
 		switch {
@@ -2860,11 +2589,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S134
 	func(r rune) int {
 		switch {
@@ -2880,11 +2607,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S135
 	func(r rune) int {
 		switch {
@@ -2904,11 +2629,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S136
 	func(r rune) int {
 		switch {
@@ -2928,11 +2651,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S137
 	func(r rune) int {
 		switch {
@@ -2952,11 +2673,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S138
 	func(r rune) int {
 		switch {
@@ -2976,11 +2695,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S139
 	func(r rune) int {
 		switch {
@@ -3000,11 +2717,9 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
-
 	// S140
 	func(r rune) int {
 		switch {
@@ -3020,7 +2735,6 @@ var TransTab = TransitionTable{
 			return 29
 		case 65534 <= r && r <= 1114111: // [\ufffe,\U0010ffff]
 			return 29
-
 		}
 		return NoState
 	},
diff --git a/graph/formats/dot/internal/parser/actiontable.go b/graph/formats/dot/internal/parser/actiontable.go
index bffc8f3c..9596d120 100644
--- a/graph/formats/dot/internal/parser/actiontable.go
+++ b/graph/formats/dot/internal/parser/actiontable.go
@@ -44,7 +44,6 @@ var actionTab = actionTable{
 			nil,       /* subgraph */
 			nil,       /* : */
 			nil,       /* id */
-
 		},
 	},
 	actionRow{ // S1
@@ -70,7 +69,6 @@ var actionTab = actionTable{
 			nil,          /* subgraph */
 			nil,          /* : */
 			nil,          /* id */
-
 		},
 	},
 	actionRow{ // S2
@@ -96,7 +94,6 @@ var actionTab = actionTable{
 			nil,       /* subgraph */
 			nil,       /* : */
 			nil,       /* id */
-
 		},
 	},
 	actionRow{ // S3
@@ -122,7 +119,6 @@ var actionTab = actionTable{
 			nil,      /* subgraph */
 			nil,      /* : */
 			nil,      /* id */
-
 		},
 	},
 	actionRow{ // S4
@@ -148,7 +144,6 @@ var actionTab = actionTable{
 			nil,       /* subgraph */
 			nil,       /* : */
 			nil,       /* id */
-
 		},
 	},
 	actionRow{ // S5
@@ -174,7 +169,6 @@ var actionTab = actionTable{
 			nil,       /* subgraph */
 			nil,       /* : */
 			nil,       /* id */
-
 		},
 	},
 	actionRow{ // S6
@@ -200,7 +194,6 @@ var actionTab = actionTable{
 			nil,        /* subgraph */
 			nil,        /* : */
 			shift(11),  /* id */
-
 		},
 	},
 	actionRow{ // S7
@@ -226,7 +219,6 @@ var actionTab = actionTable{
 			nil,       /* subgraph */
 			nil,       /* : */
 			reduce(6), /* id, reduce: DirectedGraph */
-
 		},
 	},
 	actionRow{ // S8
@@ -252,7 +244,6 @@ var actionTab = actionTable{
 			nil,       /* subgraph */
 			nil,       /* : */
 			reduce(7), /* id, reduce: DirectedGraph */
-
 		},
 	},
 	actionRow{ // S9
@@ -278,7 +269,6 @@ var actionTab = actionTable{
 			nil,       /* subgraph */
 			nil,       /* : */
 			nil,       /* id */
-
 		},
 	},
 	actionRow{ // S10
@@ -304,7 +294,6 @@ var actionTab = actionTable{
 			nil,        /* subgraph */
 			nil,        /* : */
 			nil,        /* id */
-
 		},
 	},
 	actionRow{ // S11
@@ -330,7 +319,6 @@ var actionTab = actionTable{
 			nil,        /* subgraph */
 			nil,        /* : */
 			nil,        /* id */
-
 		},
 	},
 	actionRow{ // S12
@@ -356,7 +344,6 @@ var actionTab = actionTable{
 			shift(29),  /* subgraph */
 			nil,        /* : */
 			shift(30),  /* id */
-
 		},
 	},
 	actionRow{ // S13
@@ -382,7 +369,6 @@ var actionTab = actionTable{
 			nil,       /* subgraph */
 			nil,       /* : */
 			nil,       /* id */
-
 		},
 	},
 	actionRow{ // S14
@@ -408,7 +394,6 @@ var actionTab = actionTable{
 			nil,        /* subgraph */
 			nil,        /* : */
 			nil,        /* id */
-
 		},
 	},
 	actionRow{ // S15
@@ -434,7 +419,6 @@ var actionTab = actionTable{
 			shift(29),  /* subgraph */
 			nil,        /* : */
 			shift(30),  /* id */
-
 		},
 	},
 	actionRow{ // S16
@@ -460,7 +444,6 @@ var actionTab = actionTable{
 			reduce(17), /* subgraph, reduce: OptSemi */
 			nil,        /* : */
 			reduce(17), /* id, reduce: OptSemi */
-
 		},
 	},
 	actionRow{ // S17
@@ -486,7 +469,6 @@ var actionTab = actionTable{
 			reduce(12), /* subgraph, reduce: Stmt */
 			nil,        /* : */
 			reduce(12), /* id, reduce: Stmt */
-
 		},
 	},
 	actionRow{ // S18
@@ -512,7 +494,6 @@ var actionTab = actionTable{
 			reduce(13), /* subgraph, reduce: Stmt */
 			nil,        /* : */
 			reduce(13), /* id, reduce: Stmt */
-
 		},
 	},
 	actionRow{ // S19
@@ -538,7 +519,6 @@ var actionTab = actionTable{
 			reduce(14), /* subgraph, reduce: Stmt */
 			nil,        /* : */
 			reduce(14), /* id, reduce: Stmt */
-
 		},
 	},
 	actionRow{ // S20
@@ -564,7 +544,6 @@ var actionTab = actionTable{
 			reduce(15), /* subgraph, reduce: Stmt */
 			nil,        /* : */
 			reduce(15), /* id, reduce: Stmt */
-
 		},
 	},
 	actionRow{ // S21
@@ -590,7 +569,6 @@ var actionTab = actionTable{
 			reduce(16), /* subgraph, reduce: Stmt */
 			nil,        /* : */
 			reduce(16), /* id, reduce: Stmt */
-
 		},
 	},
 	actionRow{ // S22
@@ -616,7 +594,6 @@ var actionTab = actionTable{
 			reduce(32), /* subgraph, reduce: OptAttrList */
 			nil,        /* : */
 			reduce(32), /* id, reduce: OptAttrList */
-
 		},
 	},
 	actionRow{ // S23
@@ -642,7 +619,6 @@ var actionTab = actionTable{
 			nil,       /* subgraph */
 			nil,       /* : */
 			nil,       /* id */
-
 		},
 	},
 	actionRow{ // S24
@@ -668,7 +644,6 @@ var actionTab = actionTable{
 			nil,       /* subgraph */
 			nil,       /* : */
 			nil,       /* id */
-
 		},
 	},
 	actionRow{ // S25
@@ -694,7 +669,6 @@ var actionTab = actionTable{
 			nil,        /* subgraph */
 			nil,        /* : */
 			nil,        /* id */
-
 		},
 	},
 	actionRow{ // S26
@@ -720,7 +694,6 @@ var actionTab = actionTable{
 			nil,        /* subgraph */
 			nil,        /* : */
 			nil,        /* id */
-
 		},
 	},
 	actionRow{ // S27
@@ -746,7 +719,6 @@ var actionTab = actionTable{
 			reduce(50), /* subgraph, reduce: OptPort */
 			shift(46),  /* : */
 			reduce(50), /* id, reduce: OptPort */
-
 		},
 	},
 	actionRow{ // S28
@@ -772,7 +744,6 @@ var actionTab = actionTable{
 			nil,       /* subgraph */
 			nil,       /* : */
 			nil,       /* id */
-
 		},
 	},
 	actionRow{ // S29
@@ -798,7 +769,6 @@ var actionTab = actionTable{
 			nil,        /* subgraph */
 			nil,        /* : */
 			shift(11),  /* id */
-
 		},
 	},
 	actionRow{ // S30
@@ -824,7 +794,6 @@ var actionTab = actionTable{
 			reduce(52), /* subgraph, reduce: ID */
 			reduce(52), /* :, reduce: ID */
 			reduce(52), /* id, reduce: ID */
-
 		},
 	},
 	actionRow{ // S31
@@ -850,7 +819,6 @@ var actionTab = actionTable{
 			nil,       /* subgraph */
 			nil,       /* : */
 			nil,       /* id */
-
 		},
 	},
 	actionRow{ // S32
@@ -876,7 +844,6 @@ var actionTab = actionTable{
 			reduce(17), /* subgraph, reduce: OptSemi */
 			nil,        /* : */
 			reduce(17), /* id, reduce: OptSemi */
-
 		},
 	},
 	actionRow{ // S33
@@ -902,7 +869,6 @@ var actionTab = actionTable{
 			reduce(8), /* subgraph, reduce: StmtList */
 			nil,       /* : */
 			reduce(8), /* id, reduce: StmtList */
-
 		},
 	},
 	actionRow{ // S34
@@ -928,7 +894,6 @@ var actionTab = actionTable{
 			reduce(18), /* subgraph, reduce: OptSemi */
 			nil,        /* : */
 			reduce(18), /* id, reduce: OptSemi */
-
 		},
 	},
 	actionRow{ // S35
@@ -954,7 +919,6 @@ var actionTab = actionTable{
 			reduce(19), /* subgraph, reduce: NodeStmt */
 			nil,        /* : */
 			reduce(19), /* id, reduce: NodeStmt */
-
 		},
 	},
 	actionRow{ // S36
@@ -980,7 +944,6 @@ var actionTab = actionTable{
 			reduce(33), /* subgraph, reduce: OptAttrList */
 			nil,        /* : */
 			reduce(33), /* id, reduce: OptAttrList */
-
 		},
 	},
 	actionRow{ // S37
@@ -1006,7 +969,6 @@ var actionTab = actionTable{
 			nil,        /* subgraph */
 			nil,        /* : */
 			shift(55),  /* id */
-
 		},
 	},
 	actionRow{ // S38
@@ -1032,7 +994,6 @@ var actionTab = actionTable{
 			reduce(32), /* subgraph, reduce: OptAttrList */
 			nil,        /* : */
 			reduce(32), /* id, reduce: OptAttrList */
-
 		},
 	},
 	actionRow{ // S39
@@ -1058,7 +1019,6 @@ var actionTab = actionTable{
 			shift(29),  /* subgraph */
 			nil,        /* : */
 			shift(62),  /* id */
-
 		},
 	},
 	actionRow{ // S40
@@ -1084,7 +1044,6 @@ var actionTab = actionTable{
 			reduce(22), /* subgraph, reduce: DirectedEdge */
 			nil,        /* : */
 			reduce(22), /* id, reduce: DirectedEdge */
-
 		},
 	},
 	actionRow{ // S41
@@ -1110,7 +1069,6 @@ var actionTab = actionTable{
 			reduce(23), /* subgraph, reduce: DirectedEdge */
 			nil,        /* : */
 			reduce(23), /* id, reduce: DirectedEdge */
-
 		},
 	},
 	actionRow{ // S42
@@ -1136,7 +1094,6 @@ var actionTab = actionTable{
 			reduce(26), /* subgraph, reduce: AttrStmt */
 			nil,        /* : */
 			reduce(26), /* id, reduce: AttrStmt */
-
 		},
 	},
 	actionRow{ // S43
@@ -1162,7 +1119,6 @@ var actionTab = actionTable{
 			nil,       /* subgraph */
 			nil,       /* : */
 			shift(64), /* id */
-
 		},
 	},
 	actionRow{ // S44
@@ -1188,7 +1144,6 @@ var actionTab = actionTable{
 			reduce(47), /* subgraph, reduce: Node */
 			nil,        /* : */
 			reduce(47), /* id, reduce: Node */
-
 		},
 	},
 	actionRow{ // S45
@@ -1214,7 +1169,6 @@ var actionTab = actionTable{
 			reduce(51), /* subgraph, reduce: OptPort */
 			nil,        /* : */
 			reduce(51), /* id, reduce: OptPort */
-
 		},
 	},
 	actionRow{ // S46
@@ -1240,7 +1194,6 @@ var actionTab = actionTable{
 			nil,       /* subgraph */
 			nil,       /* : */
 			shift(62), /* id */
-
 		},
 	},
 	actionRow{ // S47
@@ -1266,7 +1219,6 @@ var actionTab = actionTable{
 			shift(29),  /* subgraph */
 			nil,        /* : */
 			shift(30),  /* id */
-
 		},
 	},
 	actionRow{ // S48
@@ -1292,7 +1244,6 @@ var actionTab = actionTable{
 			nil,        /* subgraph */
 			nil,        /* : */
 			nil,        /* id */
-
 		},
 	},
 	actionRow{ // S49
@@ -1318,7 +1269,6 @@ var actionTab = actionTable{
 			reduce(9), /* subgraph, reduce: StmtList */
 			nil,       /* : */
 			reduce(9), /* id, reduce: StmtList */
-
 		},
 	},
 	actionRow{ // S50
@@ -1344,7 +1294,6 @@ var actionTab = actionTable{
 			nil,        /* subgraph */
 			nil,        /* : */
 			shift(55),  /* id */
-
 		},
 	},
 	actionRow{ // S51
@@ -1370,7 +1319,6 @@ var actionTab = actionTable{
 			nil,        /* subgraph */
 			nil,        /* : */
 			reduce(38), /* id, reduce: OptSep */
-
 		},
 	},
 	actionRow{ // S52
@@ -1396,7 +1344,6 @@ var actionTab = actionTable{
 			nil,       /* subgraph */
 			nil,       /* : */
 			nil,       /* id */
-
 		},
 	},
 	actionRow{ // S53
@@ -1422,7 +1369,6 @@ var actionTab = actionTable{
 			nil,        /* subgraph */
 			nil,        /* : */
 			shift(55),  /* id */
-
 		},
 	},
 	actionRow{ // S54
@@ -1448,7 +1394,6 @@ var actionTab = actionTable{
 			nil,       /* subgraph */
 			nil,       /* : */
 			nil,       /* id */
-
 		},
 	},
 	actionRow{ // S55
@@ -1474,7 +1419,6 @@ var actionTab = actionTable{
 			nil,        /* subgraph */
 			nil,        /* : */
 			nil,        /* id */
-
 		},
 	},
 	actionRow{ // S56
@@ -1500,7 +1444,6 @@ var actionTab = actionTable{
 			reduce(20), /* subgraph, reduce: EdgeStmt */
 			nil,        /* : */
 			reduce(20), /* id, reduce: EdgeStmt */
-
 		},
 	},
 	actionRow{ // S57
@@ -1526,7 +1469,6 @@ var actionTab = actionTable{
 			reduce(46), /* subgraph, reduce: Vertex */
 			nil,        /* : */
 			reduce(46), /* id, reduce: Vertex */
-
 		},
 	},
 	actionRow{ // S58
@@ -1552,7 +1494,6 @@ var actionTab = actionTable{
 			reduce(45), /* subgraph, reduce: Vertex */
 			nil,        /* : */
 			reduce(45), /* id, reduce: Vertex */
-
 		},
 	},
 	actionRow{ // S59
@@ -1578,7 +1519,6 @@ var actionTab = actionTable{
 			reduce(24), /* subgraph, reduce: OptEdge */
 			nil,        /* : */
 			reduce(24), /* id, reduce: OptEdge */
-
 		},
 	},
 	actionRow{ // S60
@@ -1604,7 +1544,6 @@ var actionTab = actionTable{
 			reduce(50), /* subgraph, reduce: OptPort */
 			shift(46),  /* : */
 			reduce(50), /* id, reduce: OptPort */
-
 		},
 	},
 	actionRow{ // S61
@@ -1630,7 +1569,6 @@ var actionTab = actionTable{
 			nil,       /* subgraph */
 			nil,       /* : */
 			nil,       /* id */
-
 		},
 	},
 	actionRow{ // S62
@@ -1656,7 +1594,6 @@ var actionTab = actionTable{
 			reduce(52), /* subgraph, reduce: ID */
 			reduce(52), /* :, reduce: ID */
 			reduce(52), /* id, reduce: ID */
-
 		},
 	},
 	actionRow{ // S63
@@ -1682,7 +1619,6 @@ var actionTab = actionTable{
 			reduce(41), /* subgraph, reduce: Attr */
 			nil,        /* : */
 			reduce(41), /* id, reduce: Attr */
-
 		},
 	},
 	actionRow{ // S64
@@ -1708,7 +1644,6 @@ var actionTab = actionTable{
 			reduce(52), /* subgraph, reduce: ID */
 			nil,        /* : */
 			reduce(52), /* id, reduce: ID */
-
 		},
 	},
 	actionRow{ // S65
@@ -1734,7 +1669,6 @@ var actionTab = actionTable{
 			reduce(48), /* subgraph, reduce: Port */
 			shift(77),  /* : */
 			reduce(48), /* id, reduce: Port */
-
 		},
 	},
 	actionRow{ // S66
@@ -1760,7 +1694,6 @@ var actionTab = actionTable{
 			nil,       /* subgraph */
 			nil,       /* : */
 			nil,       /* id */
-
 		},
 	},
 	actionRow{ // S67
@@ -1786,7 +1719,6 @@ var actionTab = actionTable{
 			nil,       /* subgraph */
 			nil,       /* : */
 			nil,       /* id */
-
 		},
 	},
 	actionRow{ // S68
@@ -1812,7 +1744,6 @@ var actionTab = actionTable{
 			nil,        /* subgraph */
 			nil,        /* : */
 			reduce(39), /* id, reduce: OptSep */
-
 		},
 	},
 	actionRow{ // S69
@@ -1838,7 +1769,6 @@ var actionTab = actionTable{
 			nil,        /* subgraph */
 			nil,        /* : */
 			reduce(34), /* id, reduce: AList */
-
 		},
 	},
 	actionRow{ // S70
@@ -1864,7 +1794,6 @@ var actionTab = actionTable{
 			nil,        /* subgraph */
 			nil,        /* : */
 			reduce(40), /* id, reduce: OptSep */
-
 		},
 	},
 	actionRow{ // S71
@@ -1890,7 +1819,6 @@ var actionTab = actionTable{
 			reduce(30), /* subgraph, reduce: AttrList */
 			nil,        /* : */
 			reduce(30), /* id, reduce: AttrList */
-
 		},
 	},
 	actionRow{ // S72
@@ -1916,7 +1844,6 @@ var actionTab = actionTable{
 			nil,        /* subgraph */
 			nil,        /* : */
 			reduce(38), /* id, reduce: OptSep */
-
 		},
 	},
 	actionRow{ // S73
@@ -1942,7 +1869,6 @@ var actionTab = actionTable{
 			nil,       /* subgraph */
 			nil,       /* : */
 			shift(82), /* id */
-
 		},
 	},
 	actionRow{ // S74
@@ -1968,7 +1894,6 @@ var actionTab = actionTable{
 			reduce(25), /* subgraph, reduce: OptEdge */
 			nil,        /* : */
 			reduce(25), /* id, reduce: OptEdge */
-
 		},
 	},
 	actionRow{ // S75
@@ -1994,7 +1919,6 @@ var actionTab = actionTable{
 			reduce(21), /* subgraph, reduce: Edge */
 			nil,        /* : */
 			reduce(21), /* id, reduce: Edge */
-
 		},
 	},
 	actionRow{ // S76
@@ -2020,7 +1944,6 @@ var actionTab = actionTable{
 			shift(29),  /* subgraph */
 			nil,        /* : */
 			shift(30),  /* id */
-
 		},
 	},
 	actionRow{ // S77
@@ -2046,7 +1969,6 @@ var actionTab = actionTable{
 			nil,       /* subgraph */
 			nil,       /* : */
 			shift(85), /* id */
-
 		},
 	},
 	actionRow{ // S78
@@ -2072,7 +1994,6 @@ var actionTab = actionTable{
 			reduce(42), /* subgraph, reduce: Subgraph */
 			nil,        /* : */
 			reduce(42), /* id, reduce: Subgraph */
-
 		},
 	},
 	actionRow{ // S79
@@ -2098,7 +2019,6 @@ var actionTab = actionTable{
 			reduce(31), /* subgraph, reduce: AttrList */
 			nil,        /* : */
 			reduce(31), /* id, reduce: AttrList */
-
 		},
 	},
 	actionRow{ // S80
@@ -2124,7 +2044,6 @@ var actionTab = actionTable{
 			nil,        /* subgraph */
 			nil,        /* : */
 			reduce(35), /* id, reduce: AList */
-
 		},
 	},
 	actionRow{ // S81
@@ -2150,7 +2069,6 @@ var actionTab = actionTable{
 			nil,        /* subgraph */
 			nil,        /* : */
 			reduce(41), /* id, reduce: Attr */
-
 		},
 	},
 	actionRow{ // S82
@@ -2176,7 +2094,6 @@ var actionTab = actionTable{
 			nil,        /* subgraph */
 			nil,        /* : */
 			reduce(52), /* id, reduce: ID */
-
 		},
 	},
 	actionRow{ // S83
@@ -2202,7 +2119,6 @@ var actionTab = actionTable{
 			nil,       /* subgraph */
 			nil,       /* : */
 			nil,       /* id */
-
 		},
 	},
 	actionRow{ // S84
@@ -2228,7 +2144,6 @@ var actionTab = actionTable{
 			reduce(49), /* subgraph, reduce: Port */
 			nil,        /* : */
 			reduce(49), /* id, reduce: Port */
-
 		},
 	},
 	actionRow{ // S85
@@ -2254,7 +2169,6 @@ var actionTab = actionTable{
 			reduce(52), /* subgraph, reduce: ID */
 			nil,        /* : */
 			reduce(52), /* id, reduce: ID */
-
 		},
 	},
 	actionRow{ // S86
@@ -2280,7 +2194,6 @@ var actionTab = actionTable{
 			reduce(42), /* subgraph, reduce: Subgraph */
 			nil,        /* : */
 			reduce(42), /* id, reduce: Subgraph */
-
 		},
 	},
 }
diff --git a/graph/formats/dot/internal/parser/gototable.go b/graph/formats/dot/internal/parser/gototable.go
index b4539576..9c55e43d 100644
--- a/graph/formats/dot/internal/parser/gototable.go
+++ b/graph/formats/dot/internal/parser/gototable.go
@@ -51,7 +51,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S1
 		-1, // S'
@@ -84,7 +83,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S2
 		-1, // S'
@@ -117,7 +115,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S3
 		-1, // S'
@@ -150,7 +147,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S4
 		-1, // S'
@@ -183,7 +179,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S5
 		-1, // S'
@@ -216,7 +211,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S6
 		-1, // S'
@@ -249,7 +243,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		10, // ID
 		9,  // OptID
-
 	},
 	gotoRow{ // S7
 		-1, // S'
@@ -282,7 +275,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S8
 		-1, // S'
@@ -315,7 +307,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S9
 		-1, // S'
@@ -348,7 +339,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S10
 		-1, // S'
@@ -381,7 +371,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S11
 		-1, // S'
@@ -414,7 +403,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S12
 		-1, // S'
@@ -447,7 +435,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		27, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S13
 		-1, // S'
@@ -480,7 +467,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S14
 		-1, // S'
@@ -513,7 +499,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S15
 		-1, // S'
@@ -546,7 +531,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		27, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S16
 		-1, // S'
@@ -579,7 +563,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S17
 		-1, // S'
@@ -612,7 +595,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S18
 		-1, // S'
@@ -645,7 +627,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S19
 		-1, // S'
@@ -678,7 +659,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S20
 		-1, // S'
@@ -711,7 +691,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S21
 		-1, // S'
@@ -744,7 +723,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S22
 		-1, // S'
@@ -777,7 +755,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S23
 		-1, // S'
@@ -810,7 +787,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S24
 		-1, // S'
@@ -843,7 +819,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S25
 		-1, // S'
@@ -876,7 +851,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S26
 		-1, // S'
@@ -909,7 +883,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S27
 		-1, // S'
@@ -942,7 +915,6 @@ var gotoTab = gotoTable{
 		44, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S28
 		-1, // S'
@@ -975,7 +947,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S29
 		-1, // S'
@@ -1008,7 +979,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		10, // ID
 		48, // OptID
-
 	},
 	gotoRow{ // S30
 		-1, // S'
@@ -1041,7 +1011,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S31
 		-1, // S'
@@ -1074,7 +1043,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S32
 		-1, // S'
@@ -1107,7 +1075,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S33
 		-1, // S'
@@ -1140,7 +1107,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S34
 		-1, // S'
@@ -1173,7 +1139,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S35
 		-1, // S'
@@ -1206,7 +1171,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S36
 		-1, // S'
@@ -1239,7 +1203,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S37
 		-1, // S'
@@ -1272,7 +1235,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		54, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S38
 		-1, // S'
@@ -1305,7 +1267,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S39
 		-1, // S'
@@ -1338,7 +1299,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		60, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S40
 		-1, // S'
@@ -1371,7 +1331,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S41
 		-1, // S'
@@ -1404,7 +1363,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S42
 		-1, // S'
@@ -1437,7 +1395,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S43
 		-1, // S'
@@ -1470,7 +1427,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		63, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S44
 		-1, // S'
@@ -1503,7 +1459,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S45
 		-1, // S'
@@ -1536,7 +1491,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S46
 		-1, // S'
@@ -1569,7 +1523,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		65, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S47
 		-1, // S'
@@ -1602,7 +1555,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		27, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S48
 		-1, // S'
@@ -1635,7 +1587,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S49
 		-1, // S'
@@ -1668,7 +1619,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S50
 		-1, // S'
@@ -1701,7 +1651,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		54, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S51
 		-1, // S'
@@ -1734,7 +1683,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S52
 		-1, // S'
@@ -1767,7 +1715,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S53
 		-1, // S'
@@ -1800,7 +1747,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		54, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S54
 		-1, // S'
@@ -1833,7 +1779,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S55
 		-1, // S'
@@ -1866,7 +1811,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S56
 		-1, // S'
@@ -1899,7 +1843,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S57
 		-1, // S'
@@ -1932,7 +1875,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S58
 		-1, // S'
@@ -1965,7 +1907,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S59
 		-1, // S'
@@ -1998,7 +1939,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S60
 		-1, // S'
@@ -2031,7 +1971,6 @@ var gotoTab = gotoTable{
 		44, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S61
 		-1, // S'
@@ -2064,7 +2003,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S62
 		-1, // S'
@@ -2097,7 +2035,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S63
 		-1, // S'
@@ -2130,7 +2067,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S64
 		-1, // S'
@@ -2163,7 +2099,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S65
 		-1, // S'
@@ -2196,7 +2131,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S66
 		-1, // S'
@@ -2229,7 +2163,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S67
 		-1, // S'
@@ -2262,7 +2195,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S68
 		-1, // S'
@@ -2295,7 +2227,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S69
 		-1, // S'
@@ -2328,7 +2259,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S70
 		-1, // S'
@@ -2361,7 +2291,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S71
 		-1, // S'
@@ -2394,7 +2323,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S72
 		-1, // S'
@@ -2427,7 +2355,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S73
 		-1, // S'
@@ -2460,7 +2387,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		81, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S74
 		-1, // S'
@@ -2493,7 +2419,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S75
 		-1, // S'
@@ -2526,7 +2451,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S76
 		-1, // S'
@@ -2559,7 +2483,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		27, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S77
 		-1, // S'
@@ -2592,7 +2515,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		84, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S78
 		-1, // S'
@@ -2625,7 +2547,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S79
 		-1, // S'
@@ -2658,7 +2579,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S80
 		-1, // S'
@@ -2691,7 +2611,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S81
 		-1, // S'
@@ -2724,7 +2643,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S82
 		-1, // S'
@@ -2757,7 +2675,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S83
 		-1, // S'
@@ -2790,7 +2707,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S84
 		-1, // S'
@@ -2823,7 +2739,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S85
 		-1, // S'
@@ -2856,7 +2771,6 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 	gotoRow{ // S86
 		-1, // S'
@@ -2889,6 +2803,5 @@ var gotoTab = gotoTable{
 		-1, // OptPort
 		-1, // ID
 		-1, // OptID
-
 	},
 }
diff --git a/graph/formats/dot/internal/parser/parser.go b/graph/formats/dot/internal/parser/parser.go
index 450abd12..949ac3b8 100644
--- a/graph/formats/dot/internal/parser/parser.go
+++ b/graph/formats/dot/internal/parser/parser.go
@@ -36,7 +36,8 @@ type stack struct {
 const iNITIAL_STACK_SIZE = 100
 
 func newStack() *stack {
-	return &stack{state: make([]int, 0, iNITIAL_STACK_SIZE),
+	return &stack{
+		state:  make([]int, 0, iNITIAL_STACK_SIZE),
 		attrib: make([]Attrib, 0, iNITIAL_STACK_SIZE),
 	}
 }
@@ -196,7 +197,6 @@ func (this *Parser) Parse(scanner Scanner) (res interface{}, err error) {
 				panic("Error recovery led to invalid action")
 			}
 		}
-
 		// fmt.Printf("S%d %s %s\n", this.stack.top(), token.TokMap.TokenString(this.nextToken), action.String())
 
 		switch act := action.(type) {
diff --git a/graph/formats/dot/makeinternal.bash b/graph/formats/dot/makeinternal.bash
new file mode 100755
index 00000000..df377163
--- /dev/null
+++ b/graph/formats/dot/makeinternal.bash
@@ -0,0 +1,4 @@
+#!/usr/bin/env bash
+
+cd internal
+make clean && make