bug#44362: Grep pipe doc needs to warn about --null

[積丹尼 Dan Jacobson]

I'll make the change for you.

But I checked on
https://www.gnu.org/software/emacs/
https://www.gnu.org/software/tasklist/howto-volunteer.html
and can't find where I can edit the source (hopefully like it is easy to do on
GitHub too.)

>>>>> "LI" == Lars Ingebrigtsen <larsi@gnus.org> writes:
LI> 積丹尼 Dan Jacobson <jidanni@jidanni.org> writes:

>> (info "(emacs) Grep Searching") says
>> 
>> Your command need not simply run ‘grep’; you can use any shell
>> command that produces output in the same format.  For instance, you can
>> chain ‘grep’ commands, like this:
>> 
>> grep -nH -e foo *.el | grep bar | grep toto
>> 
>> OK, but it also needs to mention:
>> 
>> To have this currently work, be sure to remove the "--null" currently
>> added to today's prompt,
>> 
>> Run grep (like this): grep --color -nH --null -e

LI> I don't think the manual can warn you about all invalid things a user
LI> may decide to put in the command line.  The --null is part of the
LI> default command line, so I see your point, but I don't think mentioning
LI> this stuff in the user manual would make much sense, and I'm closing
LI> this bug report.