tests/test-mq-qsave.t

testrunner: make reading of test times work with #testcases

Due to a bug that will be fixed in the next patch, we never actually
read back .testcases, so we didn't notice that it could not be parsed
successfully when there are #testcases tests. The parsing failed on
lines like "test-amend-subrepo.t (case obsstore-off) 32.420" because
we used a simple string.split() call and expected all parts but the
first to be floating point numbers (and "(case" isn't, for
example). Fix by using a regex instead.

Differential Revision: https://phab.mercurial-scm.org/D1960

  $ 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