tests/test-purge-ignored-directory.t

match: avoid rust fast path if the matcher was tampered with

Otherwise the fast path does not respect the modifications made
by the extension (concretely largefiles, but other extensions can
start using that too)

skip ignored directories if -i or --all not specified

  $ hg init t
  $ cd t
  $ echo 'ignored' > .hgignore
  $ hg ci -qA -m init -d'2 0'
  $ mkdir ignored
  $ ls
  ignored
  $ hg purge -v --no-confirm
  $ ls
  ignored