Merge "Handle the case when non-optional props have the same value"

    if len(overriding_props) > 1:

      # duplicated props are allowed when the all have the same value

      if all(overriding_props[0].value == p.value for p in overriding_props):

        for p in optional_props:

          p.delete("overridden by %s" % str(overriding_props[0]))

        continue

      # or if dup is explicitly allowed for compat reason

      if allow_dup:

      stderr_redirect = io.StringIO()

      with contextlib.redirect_stderr(stderr_redirect):

        props = PropList("hello")

        optional_prop = props.get_props("foo")[2] # the last foo?=false one

        # we have duplicated foo=true and foo=true, but that's allowed

        # since they have the same value

        self.assertTrue(override_optional_props(props))

        # foo?=false should be commented out

        self.assertEqual("# Removed by post_process_props.py because " +

                         "overridden by foo=true\n#foo?=false",

                         str(optional_prop))

  def test_allowDuplicates(self):

    content = """

    # comment