Refactor matchpats and walk Move core match function code to util Add some comments and whitespace Simplify options Use lambdas instead of always and never

\.orig$
\.rej$
~$
\.so$
\.pyc$
\.swp$
^build/
^dist/
^doc/.*\.[0-9]$
^MANIFEST$
^.pc/
^patches/
^mercurial/__version__.py$