Show usage string for 'git show-ref -h'

diff --git a/Documentation/git-filter-branch.txt b/Documentation/git-filter-branch.txt
index ab527b5b316a81eddd8a0eefb501448a3097182f..2b40babb6ba1c5eb99ae2cc7748854f5e4dcd864 100644 (file)
--- a/Documentation/git-filter-branch.txt
+++ b/Documentation/git-filter-branch.txt
@@ -12,6 +12,7 @@ SYNOPSIS
        [--index-filter <command>] [--parent-filter <command>]
        [--msg-filter <command>] [--commit-filter <command>]
        [--tag-name-filter <command>] [--subdirectory-filter <directory>]
+       [--prune-empty]
        [--original <namespace>] [-d <directory>] [-f | --force]
        [--] [<rev-list options>...]
 
@@ -305,6 +306,16 @@ range in addition to the new branch name.  The new branch name will
 point to the top-most revision that a 'git-rev-list' of this range
 will print.
 
+If you need to add 'Acked-by' lines to, say, the last 10 commits (none
+of which is a merge), use this command:
+
+--------------------------------------------------------
+git filter-branch --msg-filter '
+       cat &&
+       echo "Acked-by: Bugs Bunny <bunny@bugzilla.org>"
+' HEAD~10..HEAD
+--------------------------------------------------------
+
 *NOTE* the changes introduced by the commits, and which are not reverted
 by subsequent commits, will still be in the rewritten branch. If you want
 to throw out _changes_ together with the commits, you should use the