[-l | --files-with-matches] [-L | --files-without-match]
[-z | --null]
[-c | --count] [--all-match]
+ [--color | --no-color]
[-A <post-context>] [-B <pre-context>] [-C <context>]
[-f <file>] [-e] <pattern>
[--and|--or|--not|(|)|-e <pattern>...] [<tree>...]
Instead of showing every matched line, show the number of
lines that match.
+--color::
+ Show colored matches.
+
+--no-color::
+ Turn off match highlighting, even when the configuration file
+ gives the default to color output.
+
-[ABC] <context>::
Show `context` trailing (`A` -- after), or leading (`B`
-- before), or both (`C` -- context) lines, and place a