logcmdutil: make default parameters of changesetprinters consistent

mdiff: use str.startswith/endswith() instead of slicing

patch: unify check_binary and binary flags Follows up 079b27b5a869. If opts.text=True, check_binary is ignored, so we can just pass the binary flag to unidiff(). perfunidiff now takes any inputs as text files, which I think is a desired behavior.

fileset: don't abort when running copied() on a revision with a removed file It looks like AND with any status-y fileset would trigger this, as added() and removed() also failed. The 4.5-rc revision is a convenient test case, but the merge isn't necessary.