Running Ruff 0.6.9 as ruff check --isolated --select PYI030 --fix test.py deletes any subscripted types in a union with the offending Literals:

from typing import IO, Literal

InlineOption = Literal["a"] | Literal["b"] | IO[str]

becomes

from typing import IO, Literal

InlineOption = Literal["a", "b"]

Glancing through the code, it looks like this if block is just missing else { other_exprs.push(expr); }: