gives the default to color output.
Same as `--color=never`.
+--break::
+ Print an empty line between matches from different files.
+
+--heading::
+ Show the filename above the matches in that file instead of
+ at the start of each shown line.
+
-[ABC] <context>::
Show `context` trailing (`A` -- after), or leading (`B`
-- before), or both (`C` -- context) lines, and place a