Unexpected behavior parsing of tags inside substitutions

[Jacob-Bishop]

Minimum reproducible example

import rhasspynlu
rhasspynlu.parse_ini("""[foo]\nmidnight:(12{hour} am)\n""")

Actual result

defaultdict(<class 'list'>,
            {'foo': [Sentence(text='midnight:(12{hour} am)',
                              tag=None,
                              substitution=None,
                              converters=[],
                              items=[Word(text='midnight',
                                          tag=Tag(substitution=None,
                                                  converters=[],
                                                  tag_text='hour'),
                                          substitution='12',
                                          converters=[]),
                                     Word(text='am)',
                                          tag=None,
                                          substitution=None,
                                          converters=[])],
                              type=<SequenceType.GROUP: 'group'>)]})

Note in particular that we have am) parsed as a word (including the trailing parenthesis).

Expected result
I'm not sure exactly what the tree should look like, but I definitely didn't expect the trailing parenthesis from the substitution group to be parsed as part of a word. I would broadly expect this to be functionally similar to doing the following (below), except maybe with midnight as the text value for both "12" and "am" instead of as a separate word?

rhasspynlu.parse_ini("""[foo]\nmidnight: :12{hour} :am\n""")