tests: replace #...# syntax with {...}

match: use self.exact instead of lambda self.exact uses a set and does not need an extra copy of the files

dirstate: use quicker matchfn() instead of match() everywhere matchfn does the same as match(), but a direct "link"

patchbomb: don't localize Date headers

alias: a0104303f400 did not correctly handle whitespace in the args

update --clean: do not unlink added files (issue575)