Move _clean_zip_name into a nested function (#7284)
Move _clean_zip_name into a nested function (#7284)


sbidoul/pip,xavfernandez/pip,pfmoore/pip,xavfernandez/pip,pfmoore/pip,pradyunsg/pip,pypa/pip,xavfernandez/pip,pypa/pip,pradyunsg/pip,sbidoul/pip