def _capitalize_first_letter(word):
    """
    Capitalizes JUST the first letter of a word token.

    Note that str.title() doesn't work properly with apostrophes.
    ex. "john's".title() == "John'S"
    """
    if len(word) == 1:
        return word.upper()
    else:
        return word[0].upper() + word[1:]