check-code: do not warn on printf \\x or \\[1-9] When there is a double backslash the following char does not have any special meaning. So do not warn on this. Remove the now obsolete no-check-code statement. (It was used wrongly anyway, it skipped checking the entire file.)

summary: remove passing of rev because summary does not have this The command summary does not have a rev argument, so passing this results is None always. Therefore pass None explicitly.