tests/test-mq-qsave.t

util: fix url.__str__() for windows file URLs

Before:

  >>> str(url('file:///c:/tmp/foo/bar'))
  'file:c%3C/tmp/foo/bar'

After:

  >>> str(url('file:///c:/tmp/foo/bar'))
  'file:///c%3C/tmp/foo/bar'

The previous behaviour had no effect on mercurial itself (clone command for
instance) because we fortunately called .localpath() on the parsed URL.
hgsubversion was not so lucky and cloning a local subversion repository on
Windows no longer worked on the default branch (it works on stable because
de7e2fba4326 defeats the hasdriveletter() test in url class).

I do not know if the %3C is correct or not but svn accepts file:// URLs
containing it. Mads fixed it in de7e2fba4326, so we can always backport should
the need arise.

  $ 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