grep: clarify that --all works exactly the same way as --diff
7fbb5d76c555 "grep: add --diff flag" says as such, but the help strings
have diverged since, and it's getting fuzzier what this --all will do.
--- a/mercurial/commands.py Thu Sep 17 15:34:13 2020 +0200
+++ b/mercurial/commands.py Thu Sep 10 13:10:53 2020 +0900
@@ -3252,7 +3252,7 @@
b'grep',
[
(b'0', b'print0', None, _(b'end fields with NUL')),
- (b'', b'all', None, _(b'print all revisions that match (DEPRECATED) ')),
+ (b'', b'all', None, _(b'an alias to --diff (DEPRECATED)')),
(
b'',
b'diff',