bug#16966: [PATCH] grep: optimization with the superset of DFA

[Norihiro Tanaka]

Norihiro Tanaka wrote:
> For example, I try following text for the pattern `a.b'. 

In UTF8, the pattern `a.b' doesn't use the superset.  Consider `a[d-z]b'
and/or `\(a\)\1b' instead of it.

Norihiro