mq: silence spurious output. When using a versioned patch repository, you would get a spurious warning when deleting and adding the same patch. Before: $ hg qdelete --keep 3.diff $ hg qimport --existing 3.diff adding 3.diff to series file 3.diff already tracked! After: $ hg qdelete --keep 3.diff $ hg qimport --existing 3.diff adding 3.diff to series file