in swift 5.9, attributes like @frozen, @inlinable, etc. are incorrectly highlighted as identifiers rather than keywords/attributes.
this was a known issue that has already been fixed in main but evidently the fix didn’t make it into the 5.9 release.
in the meantime, is there anything we can do (short of switching to a 5.10 nightly) to get the right highlighting on 5.9?