tests: skip pyflakes for mercurial/thirdparty/ The current version of pyflakes (2.2.0) correctly detects one issue: mercurial/thirdparty/selectors2.py:335:40 '...'.format(...) has unused arguments at position(s): 1 But we're not interested in fixing lint errors in third-party code, so we need to exclude at least selectors2.py. And in the discussion for this patch it was decided to just skip the entire thirdparty directory. Differential Revision: https://phab.mercurial-scm.org/D8619

  $ echo "[extensions]" >> $HGRCPATH
  $ echo "mq=" >> $HGRCPATH

  $ hg init

  $ echo 'base' > base
  $ hg ci -Ambase
  adding base

  $ hg qnew -mmqbase mqbase

  $ hg qsave
  $ hg qrestore 2
  restoring status: hg patches saved state