bug#2397: 23.0.90; grep no longer highlights the match

[Juri Linkov]

> grep -nH -e echo $SHELL
> Binary file C:/cygwin/bin/bash.exe matches
>
> Looks like bash to me. And it's always acted like bash, AFAICT.

> That gives this:
>
> grep -nH -e echo $TERM
> grep: emacs-grep: No such file or directory

Actually I meant removing the default input (the "grep -nH -e" part)
completely, and replacing it with these commands.  So more precise
recipes are:

`M-x grep RET C-a C-k set RET'
`M-x grep RET C-a C-k echo $TERM RET'

But anyway I see that your $SHELL is "bash.exe" and $TERM is "emacs-grep".

Could you also try running grep from Bash (not from Emacs) with options
"--color=always" and "--color=auto" and see whether it outputs highlighting
sequences for both cases in a standalone shell?

-- 
Juri Linkov
http://www.jurta.org/emacs/