lfutil: avoid creating unnecessary copy of status tuple In lfdirstatestatus(), the status tuple gets deconstructed, the lists get updated, and then an identical status tuple gets created and returned. Change it so we simply return the original tuple.

dirstate: separate 'lookup' status field from others The status tuple returned from dirstate.status() has an additional field compared to the other status tuples: lookup/unsure. This field is just an optimization and not something most callers care about (they want the resolved value of 'modified' or 'clean'). To prepare for a single future status type, let's separate out the 'lookup' field from the rest by having dirstate.status() return a pair: (lookup, status).

commit: update file nodeid and flags in the same place Now that we have a separate variable for the original 'm1' manifest, we can safely update the nodeid of the file in the new manifest in the same place as we update the flags.

commit: use separate variable for p1 manifest and new manifest In localrepo.commitctx(), p1's manifest is copied and used as the basis for the manifest that is about to be committed. The way the copy is updated makes it safe to use it where the original p1's manifest is wanted. For readability, though, a separate variable for each purpose would be clearer. Make it so.

commit: remove dead initialization of 'lock' The 'lock' variable is initialized to None, but before it's ever read, it's assigned again.

commit: reduce scope of 'removed' variable The variable is closely related to 'added' and 'changed', so it makes sense to have it declared next to them.

rebase: fix some weird mixed-case naming