Start conforming code to "git subcmd" style part 3

User notifications are presented as 'git cmd', and code comments
are presented as '"cmd"' or 'git's cmd', rather than 'git-cmd'.

Signed-off-by: Heikki Orsila <heikki.orsila@iki.fi>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

builtin-rm.c

@@ -104,7 +104,7 @@ static int check_local_mod(unsigned char *head, int index_only)
 				     "from both the file and the HEAD\n"
 				     "(use -f to force removal)", name);
 		else if (!index_only) {
-			/* It's not dangerous to git-rm --cached a
+			/* It's not dangerous to "git rm --cached" a
 			 * file if the index matches the file or the
 			 * HEAD, since it means the deleted content is
 			 * still available somewhere.