Re: bug#17471: On Solaris 10, grep snapshot apparently hit by bleeding-edge Autoconf bug

[Jim Meyering]

Thanks for dealing with that.
The only potential problem I see with your patch would be when
one runs configure with a perverse program name transformation,
e.g., --program-transform-name='s/^/$/', introducing a shell
metacharacter (or leading/trailing white space!) in the resulting
name.  In that case, the lack of single quotes around @grep@
would be fatal.

Fixing that is not high priority. Anyone who does that to
grep deserves the result :-)