doc: gitrevisions - clarify 'latter case' is revision walk

diff --git a/Documentation/git-grep.txt b/Documentation/git-grep.txt
index 31811f16bdaac49d01d38dcdea82bb191942b1cf..4a44d6da13cb749759f9d6164b88974ba55485ab 100644 (file)
--- a/Documentation/git-grep.txt
+++ b/Documentation/git-grep.txt
@@ -160,12 +160,15 @@ OPTIONS
        For better compatibility with 'git diff', `--name-only` is a
        synonym for `--files-with-matches`.
 
--O [<pager>]::
---open-files-in-pager [<pager>]::
+-O[<pager>]::
+--open-files-in-pager[=<pager>]::
        Open the matching files in the pager (not the output of 'grep').
        If the pager happens to be "less" or "vi", and the user
        specified only one pattern, the first file is positioned at
-       the first match automatically.
+       the first match automatically. The `pager` argument is
+       optional; if specified, it must be stuck to the option
+       without a space. If `pager` is unspecified, the default pager
+       will be used (see `core.pager` in linkgit:git-config[1]).
 
 -z::
 --null::