call site 16 for path.local.ensure
apigen/source/testing/test_browser.py - line 74
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   def test_importing_goes_wrong():
       tmp = py.test.ensuretemp("sourcebrowserimport")
       tmp.ensure("x.py").write(py.code.Source("""
           import aslkdjaslkdjasdl
       """))
       mod = parse_path(tmp.join("x.py"))
   
->     tmp.ensure("y.py").write(py.code.Source("""
           raise KeyboardInterrupt 
       """))
       py.test.raises(KeyboardInterrupt, 'parse_path(tmp.join("y.py"))')