'Replace the fixable node with the correct gender string.
For example: <var>He(1)</var> will be \'He\' and \'She\' in the
original and cloned nodes.'

def filter_var(self, match, var_node):

    _replace_node(var_node, match.group(1))
    _replace_node(self._get_cloned_var(var_node), self._pronoun_map[match.group(1)])
    return True
