`bitdiff` was removed a long time ago. c.f. https://github.com/ilanschnell/bitarray/blob/master/doc/changelog.rst https://github.com/nexB/scancode-plugins/search?q=bitdiff
bitdiffwas removed a long time ago. c.f. https://github.com/ilanschnell/bitarray/blob/master/doc/changelog.rsthttps://github.com/nexB/scancode-plugins/search?q=bitdiff