I don't think there's any downside, and the upside is that we can use
https://github.com/kensho-technologies/pytest-annotate to kickstart type
annotations. Applying collected annotations (e.g. `pyannotate --py3
--type-info ./annotations.json lib/galaxy/workflow/run.py` currently fails with:
```
Traceback (most recent call last):
File "/Users/mvandenb/src/galaxy/.venv/bin/pyannotate", line 8, in <module>
sys.exit(main())
File "/Users/mvandenb/src/galaxy/.venv/lib/python3.9/site-packages/pyannotate_tools/annotations/__main__.py", line 122, in main
data = generate_annotations_json_string(
File "/Users/mvandenb/src/galaxy/.venv/lib/python3.9/site-packages/pyannotate_tools/annotations/main.py", line 60, in generate_annotations_json_string
signature = unify_type_comments(item.type_comments)
File "/Users/mvandenb/src/galaxy/.venv/lib/python3.9/site-packages/pyannotate_tools/annotations/main.py", line 27, in unify_type_comments
arg_types, return_type = infer_annotation(type_comments)
File "/Users/mvandenb/src/galaxy/.venv/lib/python3.9/site-packages/pyannotate_tools/annotations/infer.py", line 45, in infer_annotation
arg_types, return_type = parse_type_comment(comment)
File "/Users/mvandenb/src/galaxy/.venv/lib/python3.9/site-packages/pyannotate_tools/annotations/parse.py", line 216, in parse_type_comment
return Parser(comment).parse()
File "/Users/mvandenb/src/galaxy/.venv/lib/python3.9/site-packages/pyannotate_tools/annotations/parse.py", line 225, in __init__
self.tokens = tokenize(comment)
File "/Users/mvandenb/src/galaxy/.venv/lib/python3.9/site-packages/pyannotate_tools/annotations/parse.py", line 193, in tokenize
raise ParseError(original)
pyannotate_tools.annotations.parse.ParseError: Invalid type comment: (galaxy.app.UniverseApplication, Dict, Dict[str, galaxy.model.HistoryDatasetAssociation], Dict[Union[galaxy.security.object_wrapper:SafeStringWrapper(str:<class 'NoneType'>,<class 'NotImplementedType'>,<class 'bool'>,<class 'bytearray'>,<class 'ellipsis'>,<class 'galaxy.security.object_wrapper.SafeStringWrapper'>,<class 'galaxy.tools.wrappers.ToolParameterValueWrapper'>,<class 'numbers.Number'>), str], Union[galaxy.security.object_wrapper.CallableSafeStringWrapper, galaxy.security.object_wrapper:SafeStringWrapper(str:<class 'NoneType'>,<class 'NotImplementedType'>,<class 'bool'>,<class 'bytearray'>,<class 'ellipsis'>,<class 'galaxy.security.object_wrapper.SafeStringWrapper'>,<class 'galaxy.tools.wrappers.ToolParameterValueWrapper'>,<class 'numbers.Number'>), str]]) -> None
```
This fixes that.