Can't use colon in output lines because item parsing is too greedy

[mjpieters]

The way that out lines are matched is not allowing for colons in the output message, because the severity group can capture up to the last colon in the message:

r"^(?P<fname>.*):(?P<lnum>\d*): (?P<severity>.*):((?P<col>\d+):)? (?P<message>.*)$"

Given a typical input with type annotations in a function:

main:2: note: Revealed type is def(foo: str) -> int

the severity group captures the text note: Revealed type is def(foo.

With more colons, the group ever expands; given

main:2: note: Revealed type is def(foo: str, bar: int, baz: float) -> int

the severity group matches note: Revealed type is def(foo: str, bar: int, baz.

See https://regex101.com/r/wOwuXG/1 for how the groups are filled.

Please match only non-colon text for severity:

(?P<severity>[^:]*)

to prevent this. See https://regex101.com/r/sM2uam/1 for a demo.