here's the traceback pytest is trying to display and crashing:

```
Traceback (most recent call last):
  File "/tmp/rinohtype/venv/lib/python3.10/site-packages/_pytest/runner.py", line 311, in from_call
    result: Optional[TResult] = func()
  File "/tmp/rinohtype/venv/lib/python3.10/site-packages/_pytest/runner.py", line 341, in <lambda>
    call = CallInfo.from_call(lambda: list(collector.collect()), "collect")
  File "/tmp/rinohtype/venv/lib/python3.10/site-packages/_pytest/python.py", line 503, in collect
    self._inject_setup_module_fixture()
  File "/tmp/rinohtype/venv/lib/python3.10/site-packages/_pytest/python.py", line 516, in _inject_setup_module_fixture
    self.obj, ("setUpModule", "setup_module")
  File "/tmp/rinohtype/venv/lib/python3.10/site-packages/_pytest/python.py", line 291, in obj
    self._obj = obj = self._getobj()
  File "/tmp/rinohtype/venv/lib/python3.10/site-packages/_pytest/python.py", line 500, in _getobj
    return self._importtestmodule()
  File "/tmp/rinohtype/venv/lib/python3.10/site-packages/_pytest/python.py", line 578, in _importtestmodule
    mod = import_path(self.fspath, mode=importmode)
  File "/tmp/rinohtype/venv/lib/python3.10/site-packages/_pytest/pathlib.py", line 524, in import_path
    importlib.import_module(module_name)
  File "/home/asottile/workspace/cpython/prefix/lib/python3.10/importlib/__init__.py", line 126, in import_module
    return _bootstrap._gcd_import(name[level:], package, level)
  File "<frozen importlib._bootstrap>", line 1050, in _gcd_import
  File "<frozen importlib._bootstrap>", line 1027, in _find_and_load
  File "<frozen importlib._bootstrap>", line 1006, in _find_and_load_unlocked
  File "<frozen importlib._bootstrap>", line 688, in _load_unlocked
  File "/tmp/rinohtype/venv/lib/python3.10/site-packages/_pytest/assertion/rewrite.py", line 170, in exec_module
    exec(co, module.__dict__)
  File "/tmp/rinohtype/tests/test_attribute.py", line 11, in <module>
    from rinoh.attribute import Attribute, Bool
  File "/tmp/rinohtype/venv/lib/python3.10/site-packages/rinoh/__init__.py", line 41, in <module>
    from . import resource
  File "/tmp/rinohtype/venv/lib/python3.10/site-packages/rinoh/resource.py", line 205, in <module>
    from .template import DocumentTemplate
  File "/tmp/rinohtype/venv/lib/python3.10/site-packages/rinoh/template.py", line 42, in <module>
    from .stylesheets import sphinx
  File "/tmp/rinohtype/venv/lib/python3.10/site-packages/rinoh/stylesheets/__init__.py", line 42, in <module>
    .format(stylesheet.description, stylesheet))
  File "/tmp/rinohtype/venv/lib/python3.10/site-packages/rinoh/style.py", line 670, in __str__
    for name, entry_point in self.installed_resources:
  File "/tmp/rinohtype/venv/lib/python3.10/site-packages/rinoh/resource.py", line 54, in installed_resources
    for entry_point in ilm.entry_points()[cls.entry_point_group]:
  File "/home/asottile/workspace/cpython/prefix/lib/python3.10/importlib/metadata/__init__.py", line 979, in entry_points
    return SelectableGroups.load(eps).select(**params)
  File "/home/asottile/workspace/cpython/prefix/lib/python3.10/importlib/metadata/__init__.py", line 437, in load
    ordered = sorted(eps, key=by_group)
  File "/home/asottile/workspace/cpython/prefix/lib/python3.10/importlib/metadata/__init__.py", line -1, in <genexpr>
  File "/home/asottile/workspace/cpython/prefix/lib/python3.10/importlib/metadata/_itertools.py", line 16, in unique_everseen
    k = key(element)
  File "/home/asottile/workspace/cpython/prefix/lib/python3.10/importlib/metadata/__init__.py", line 600, in _normalized_name
    return Prepared.normalize(self.name)
  File "/home/asottile/workspace/cpython/prefix/lib/python3.10/importlib/metadata/__init__.py", line 841, in normalize
    return re.sub(r"[-_.]+", "-", name).lower().replace('-', '_')
  File "/home/asottile/workspace/cpython/prefix/lib/python3.10/re.py", line 187, in sub
    return _compile(pattern, flags).sub(repl, string, count)
TypeError: expected string or bytes-like object
```