submodule: Add --force option for git submodule update

diff --git a/Documentation/git-difftool.txt b/Documentation/git-difftool.txt
index 498b1610f46ce7a4778c0e76f36d212d2a605fae..db87f1d42382e32d7e3ee94e5c3d0a032b7430e2 100644 (file)
--- a/Documentation/git-difftool.txt
+++ b/Documentation/git-difftool.txt
@@ -7,13 +7,14 @@ git-difftool - Show changes using common diff tools
 
 SYNOPSIS
 --------
-'git difftool' [<options>] <commit>{0,2} [--] [<path>...]
+'git difftool' [<options>] [<commit> [<commit>]] [--] [<path>...]
 
 DESCRIPTION
 -----------
 'git difftool' is a git command that allows you to compare and edit files
 between revisions using common diff tools.  'git difftool' is a frontend
-to 'git diff' and accepts the same options and arguments.
+to 'git diff' and accepts the same options and arguments. See
+linkgit:git-diff[1].
 
 OPTIONS
 -------
@@ -64,6 +65,7 @@ with custom merge tool commands and has the same value as `$MERGED`.
        Specify a custom command for viewing diffs.
        'git-difftool' ignores the configured defaults and runs
        `$command $LOCAL $REMOTE` when this option is specified.
+       Additionally, `$BASE` is set in the environment.
 
 -g::
 --gui::