Merge branch 'da/difftool'

Fix-up to a new feature in 'master'.

* da/difftool:
  difftool: honor --trust-exit-code for builtin tools

git-mergetool--lib.sh

@@ -221,6 +221,7 @@ run_merge_tool () {
 	else
 		run_diff_cmd "$1"
 	fi
+	status=$?
 	return $status
 }