tdl module not properly parsing inflectional rules

[goodmami]

There are some errors in parsing inflectional rules.

>>> from delphin import tdl
>>> xs = list(tdl.parse(open('../../grammars/erg/inflr.tdl')))
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/home/goodmami/repos/pydelphin/delphin/tdl.py", line 212, in parse
    yield parse_typedef(data)
  File "/home/goodmami/repos/pydelphin/delphin/tdl.py", line 226, in parse_typedef
    affixes = parse_affixes(tokens)  # only for inflectional rules
  File "/home/goodmami/repos/pydelphin/delphin/tdl.py", line 260, in parse_affixes
    affixes.append(tokens.popleft(), tokens.popleft())
TypeError: append() takes exactly one argument (2 given)

This first error is a Python bug. After that, it appears that TdlInflRule is not being used. From parse_typedef():

try:
    identifier = tokens.popleft()
    assignment = tokens.popleft()
    affixes = parse_affixes(tokens)  # only for inflectional rules
    tdldef, corefs = parse_conjunction(tokens)
    # Now make coref paths a string instead of list
    corefs = _make_coreferences(corefs)
    #features = parse_conjunction(tokens)
    assert tokens.popleft() == '.'
    # :+ doesn't need supertypes
    if assignment != ':+' and len(tdldef.supertypes) == 0:
        raise TdlParsingError('Type definition requires supertypes.')
    t = TdlType(identifier, tdldef, coreferences=corefs)
 ...

There should be some branch to instantiate TdlInflRule if affixes is not None.