call site 3 for path.local.copy
path/testing/fscommon.py - line 168
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   def test_copy_dir(self):
       otherdir = self.root.join('otherdir')
       copied = self.root.join('newdir')
       try:
->         otherdir.copy(copied)
           assert copied.check(dir=1)
           assert copied.join('__init__.py').check(file=1)
           s1 = otherdir.join('__init__.py').read()
           s2 = copied.join('__init__.py').read()
           assert s1 == s2
       finally:
           if copied.check(dir=1):
               copied.remove(rec=1)