blas,lapack: clean up docs and comments

Apply (with manual curation after the fact):
* s/^T/U+1d40/g
* s/^H/U+1d34/g
* s/, {2,3}if / $1/g

Some additional manual editing of odd formatting.

mat/inner.go

@@ -11,7 +11,7 @@ import (
 )
 
 // Inner computes the generalized inner product
-//  x^T A y
+//  xᵀ A y
 // between the vectors x and y with matrix A, where x and y are treated as
 // column vectors.
 //