def tone_marks():
    """Keep tone-modifying punctuation by matching following character.

    Assumes the `tone_marks` pre-processor was run for cases where there might
    not be any space after a tone-modifying punctuation mark.
    """
    return RegexBuilder(
        pattern_args=symbols.TONE_MARKS,
        pattern_func=lambda x: u"(?<={}).".format(x)).regex
def tone_marks ( ) : return RegexBuilder ( pattern_args = symbols . TONE_MARKS , pattern_func = lambda x : u"(?<={})." . format ( x ) ) . regex
Keep tone-modifying punctuation by matching following character.

    Assumes the `tone_marks` pre-processor was run for cases where there might
    not be any space after a tone-modifying punctuation mark.