dirstate.changes() now distinguishes 'hg remove'd or just deleted files. Interface is not yet changed. Non-regular files are considered to be removed or deleted. Removed the unneeded match(fn) call for adding to the unknown list.

+ hg init
+ hg add a
+ hg commit -m test -d 0 0
precommit hook
commit hook: acb14030fe0a21b60322c440ad2d20cf7685a376