Failing on some mypy messages

[rik]

In my project, I ran into this error:

Traceback (most recent call last):
  File "venv/bin/prospector", line 10, in <module>
    sys.exit(main())
  File "venv/lib/python3.7/site-packages/prospector/run.py", line 173, in main
    prospector.execute()
  File "venv/lib/python3.7/site-packages/prospector/run.py", line 66, in execute
    messages += tool.run(found_files)
  File "venv/lib/python3.7/site-packages/prospector/tools/mypy/__init__.py", line 85, in run
    character=int(char),
ValueError: invalid literal for int() with base 10: ' note'

After digging a bit, I found that mypy can emit this kind of messages: file:9: note: unused 'type: ignore' comment and that https://github.com/PyCQA/prospector/blob/bf1930e7166012c84e730caa44fd43b3f852c876/prospector/tools/mypy/__init__.py#L79 can't handle this format.

[chocoelho]

@rik what's mypy version you're using and can you provide an example so we can test it?

[rik]

I've made a repository to ease testing