call site 2 for path.svnurl.relto
path/svn/testing/test_urlcommand.py - line 20
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   def test_move_file(self):  # overrides base class
       p = self.root.ensure('origfile')
       newp = p.dirpath('newfile')
->     p.move(newp)
       assert newp.check(file=1)
       newp.remove()
       assert not p.check()
path/common.py - line 365
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   def move(self, target):
       """ move this path to target. """
->     if target.relto(self):
           raise py.error.EINVAL(target, "cannot move path into a subdirectory of itself")
       try:
           self.rename(target)
       except py.error.EXDEV:  # invalid cross-device link
           self.copy(target)
           self.remove()