v1.5.9
* Initial plan * Fix ValueError when setting p.usage with %prog after OptionParser init * Update test docstring to remove placeholder issue number Co-authored-by: copilot-swe-agent[bot] <198982749+Copilot@users.noreply.github.com> Co-authored-by: tanghaibao <106987+tanghaibao@users.noreply.github.com>