copy & rename can ignore removed source files
As mercurial now distinguishes deleted files from removed files,
we can skip removed source files while copying or renaming.
adding aadding baNONEXISTENT: No such file or directoryaba: No such file or directoryNONEXISTENT: No such file or directorybaNONEXISTENT: No such file in rev 9e1684505872ab