parse_opt_ref_sorting: always use with NONEG flag

diff --git a/Documentation/git-diff-tree.txt b/Documentation/git-diff-tree.txt
index 43daa7c046f472ac856d89292ede96f5e5dcb64e..24f32e8c544a455829b25193ac6b646504ab5f34 100644 (file)
--- a/Documentation/git-diff-tree.txt
+++ b/Documentation/git-diff-tree.txt
@@ -10,8 +10,8 @@ SYNOPSIS
 --------
 [verse]
 'git diff-tree' [--stdin] [-m] [-s] [-v] [--no-commit-id] [--pretty]
-             [-t] [-r] [-c | --cc] [--root] [<common diff options>]
-             <tree-ish> [<tree-ish>] [<path>...]
+             [-t] [-r] [-c | --cc] [--combined-all-paths] [--root]
+             [<common diff options>] <tree-ish> [<tree-ish>] [<path>...]
 
 DESCRIPTION
 -----------
@@ -105,6 +105,13 @@ include::pretty-options.txt[]
        itself and the commit log message is not shown, just like in any other
        "empty diff" case.
 
+--combined-all-paths::
+       This flag causes combined diffs (used for merge commits) to
+       list the name of the file from all parents.  It thus only has
+       effect when -c or --cc are specified, and is likely only
+       useful if filename changes are detected (i.e. when either
+       rename or copy detection have been requested).
+
 --always::
        Show the commit itself and the commit log message even
        if the diff itself is empty.