call site 3 for path.SvnAuth.__init__
path/svn/testing/test_auth.py - line 72
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   def test_makecmdoptions_no_cache_auth(self):
->     auth = py.path.SvnAuth('foo', 'bar', cache_auth=False)
       assert auth.makecmdoptions() == ('--username="foo" --password="bar" '
                                        '--no-auth-cache')