fn-like macros in attribute macros break IDE functionality

[jonas-schievink]

Turning attribute macros off fixes this and highlights everything correctly.

[jonas-schievink]

I am still seeing this in https://github.com/stm32-rs/bxcan/blob/master/testsuite/tests/integration.rs

[Veykril]

Oh okay so if I see this right, the cause now is that we can expand bang macros in the non-attribute expanded item as well as the attribute expanded item. So the current logic expands the bang call in the non-attribute expanded items which probably messes with token ids.