Show [mypy] in reportinfo

[jaredahern]

Hi! With other pytest plugins that I'm familiar with, the base tool name is shown in the reportinfo header for files. I think this helps a user to parse the output. For example, pytest-pylint shows:

____________ [pylint] path/to/file.py ______________

However, pytest-mypy doesn't show "[mypy]", just the file path (tested with pytest-pylint 0.10.3 and pytest 8.3.3). I think this used to be shown, but this was lost in this commit. Or perhaps the add_marker() call should do this, but doesn't seem to; I haven't dug deeply into that.

Could this be restored please? I think all that is needed is to prepend "[mypy] " to the third item in the return tuple from MypyFileItem.reportinfo(), unless the add_marker machinery needs to be modified, and/or tests added. Happy to submit a PR if desired.

[dmtucker]

Hey, thanks for reaching out!
Sure, we can restore that 👍 Moreover, let's add a way for customize the header so anyone can make it show whatever they want.

[jaredahern]

That's great, thank you! Do you need a PR or anything from me?