mmi2grpc: Trim trailing whitespaces in descriptions

    @functools.wraps(f)

    def wrapper(*args, **kwargs):

        description = textwrap.fill(kwargs['description'], DOCSTRING_WIDTH, replace_whitespace=False)

        docstring = textwrap.dedent(f.__doc__ or '')

        description = ('\n'.join(map(lambda line: line.rstrip(), description.split('\n')))).strip()

        docstring = textwrap.dedent(f.__doc__ or '').strip()

        if docstring.strip() != description.strip():

        if docstring != description:

            print(f'Expected description of {f.__name__}:')

            print(description)

            # Generate AssertionError.

            test = unittest.TestCase()

            test.maxDiff = None

            test.assertMultiLineEqual(docstring.strip(), description.strip(),

                                      f'description does not match with function docstring of'

            test.assertMultiLineEqual(docstring, description, f'description does not match with function docstring of'

                                      f' {f.__name__}')

        return f(*args, **kwargs)

def format_function(mmi_name, mmi_description):

    """Returns the base format of a function implementing a PTS MMI."""

    wrapped_description = textwrap.fill(mmi_description, DOCSTRING_WIDTH, replace_whitespace=False)

    wrapped_description = '\n'.join(map(lambda line: line.rstrip(), wrapped_description.split('\n')))

    return (f'@assert_description\n'

            f'def {mmi_name}(self, **kwargs):\n'

            f'    """\n'