--- a/tests/test-grep.t Wed Jul 11 21:23:18 2018 +0900
+++ b/tests/test-grep.t Wed Jul 11 21:35:31 2018 +0900
@@ -412,6 +412,18 @@
$ hg grep -r "." "unmod" --all-files
um:1:unmod
+With --all-files, the working directory is searched by default
+
+ $ echo modified >> new
+ $ hg grep --all-files mod
+ new:2147483647:modified
+ um:2147483647:unmod
+
+ which can be overridden by -rREV
+
+ $ hg grep --all-files -r. mod
+ um:1:unmod
+
--diff --all-files makes no sense since --diff is the option to grep history
$ hg grep --diff --all-files um