See here:

The example return value is "rerun", "R", ("RERUN", {"yellow": True}), while the return type is documented as

Tuple[str, str, Union[str, Mapping[str, bool]]]

which don't match.

I'm assuming the return type should be

Tuple[str, str, Union[str, Tuple[str, Mapping[str, bool]]]]

Or something?

Also some clearer documentation on how the third element of the tuple is sued would be great.