Log Message:
py-pyparsing: updated to 2.4.6

Version 2.4.6:

- Fixed typos in White mapping of whitespace characters, to use
  correct "\u" prefix instead of "u\".

- Fix bug in left-associative ternary operators defined using
  infixNotation. First reported on StackOverflow by user Jeronimo.

- Backport of pyparsing_test namespace from 3.0.0, including
  TestParseResultsAsserts mixin class defining unittest-helper
  methods:
  . def assertParseResultsEquals(
            self, result, expected_list=None, expected_dict=None, msg=None)
  . def assertParseAndCheckList(
            self, expr, test_string, expected_list, msg=None, verbose=True)
  . def assertParseAndCheckDict(
            self, expr, test_string, expected_dict, msg=None, verbose=True)
  . def assertRunTestResults(
            self, run_tests_report, expected_parse_results=None, msg=None)
  . def assertRaisesParseException(self, exc_type=ParseException, msg=None)

  To use the methods in this mixin class, declare your unittest classes as:

    from pyparsing import pyparsing_test as ppt
    class MyParserTest(ppt.TestParseResultsAsserts, unittest.TestCase):
        ...