Make lint rules highlight function name only instead of the entire function body

[stevepryde]

Today I discovered the 'cognitive complexity' lint, which underlined the entire function body with a yellow wavy line. The lint rule is fine - I actually appreciated this a lot. However, underlining the entire function seems like overkill and makes it very difficult to read, let alone try to refactor it.

If this could be changed to only underline the function name, or something similarly minimal, that would make the task of refactoring much easier.