tests/test-mq-qsave.t

hook: be prepared for __stdout/err__ not having fileno()

it may have been replaced, see https://bitbucket.org/tortoisehg/thg/issue/937

  $ 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