tests/test-paths.t

demandimport: change default for level from None to -1

The Python default for this function is -1, indicating both relative
and absolute imports should be used.[1] Previously, we relied on the
Python VM not passing level when such semantics were
requisted. This is not the case for PyPy, however, where a level of -1
is always passed to __import__.

[1] <http://docs.python.org/library/functions.html#__import__>

  $ hg init a
  $ hg clone a b
  updating to branch default
  0 files updated, 0 files merged, 0 files removed, 0 files unresolved
  $ cd a
  $ echo '[paths]' >> .hg/hgrc
  $ echo 'dupe = ../b' >> .hg/hgrc
  $ echo 'expand = $SOMETHING/bar' >> .hg/hgrc
  $ hg in dupe
  comparing with $TESTTMP/b
  no changes found
  [1]
  $ cd ..
  $ hg -R a in dupe
  comparing with $TESTTMP/b
  no changes found
  [1]
  $ cd a
  $ hg paths
  dupe = $TESTTMP/b
  expand = $TESTTMP/a/$SOMETHING/bar
  $ SOMETHING=foo hg paths
  dupe = $TESTTMP/b
  expand = $TESTTMP/a/foo/bar
  $ SOMETHING=/foo hg paths
  dupe = $TESTTMP/b
  expand = /foo/bar