Reserved keywords in macros are highlighted as keywords

[allan2]

RA 0.4.2095-standalone rustc 1.82 nightly VS Code 1.92.2

Reserved keywords in macros are highlighted as keywords rather than regular tokens when used in macros.

// working code
#[my_attr_macro(mut = true, override = true, foo = true)]
fn main() {
    my_macro!(
        mut = true,
        override = false,
        foo = true,
    );
}

### Tasks

[Veykril]

That sounds correct to me. These tokens are considered keywords in the language so they should be highlighted as such (unless their span is re-used for something else in the expansion)

[allan2]

That makes sense.

I switched to a different implementation of attribute parsing (syn 1 AttributeArgs to syn 2 impl Parse), which errors with error: expected identifier, found keyword `override`.

Even though a keyword could used as an identifier, I don't think RA can tell. And it was useful to have it highlighted for me.