CommonsDelinker strips file namespace prefix when renaming files
When a file has been renamed and CommonsDelinker changes an image link the file namespace prefix is sometimes stripped breaking the link. For example in https://en.wikipedia.org/w/index.php?title=5_Astraea&diff=prev&oldid=1048314440 File:5 Astraea Symbol.svg was changed to Astraea symbol.svg.
The problem seems to occur when the old image name starts with a number. See https://commons.wikimedia.org/w/index.php?title=Commons:Village_pump&oldid=596386213#Commons_delinker_mishandling_links
Examples: https://en.wikipedia.org/w/index.php?title=8_Flora&diff=1048314829&oldid=1031089749 https://vi.wikipedia.org/w/index.php?title=Ti%E1%BB%83u_h%C3%A0nh_tinh&diff=66202005&oldid=66170611 https://ru.wikipedia.org/w/index.php?title=%D0%90%D1%81%D1%82%D0%B5%D1%80%D0%BE%D0%B8%D0%B4&diff=116921028&oldid=116371058 https://id.wikipedia.org/w/index.php?title=Asteroid&diff=19193480&oldid=18553579 https://su.wikipedia.org/w/index.php?title=Ast%C3%A9roid&diff=617751&oldid=531870