bug#36644: Git log search

[Dmitry Gutov]

On 25.07.2019 16:08, Eli Zaretskii wrote:
> It actually leaves that to the user: you can invoke any program you
> want.  E.g., I invoke 'fgrep' this way very frequently.

That's true, but I was thinking more along the lines of using e.g. Ag 
for 'M-x grep' if the user customizes some variable in a particular way.

The "invoke any program" workflow is good and all, but it's much easier 
to describe in the docstring, so it's not the issue.