travis,unit: fix and check unit code generation

Also fix blas generate check for move.

unit/length.go

@@ -1,5 +1,4 @@
-// This file is autogenerated by github.com/gonum/unit/autogen
-// Changes should be made to the autogenerated template rather than this one
+// Code generated by "go generate gonum.org/v1/gonum/unit”; DO NOT EDIT.
 
 // Copyright ©2014 The gonum Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style
@@ -87,6 +86,5 @@ func (l Length) Format(fs fmt.State, c rune) {
 		fmt.Fprint(fs, " m")
 	default:
 		fmt.Fprintf(fs, "%%!%c(%T=%g m)", c, l, float64(l))
-		return
 	}
 }