Rollup merge of #25137 - carols10cents:fix-token-declaration, r=alexcrichton

I know this is the most trivial thing since it's *just* the model lexer, not the real lexer, but [it is simpler to read](https://github.com/rust-lang/rust/issues/15883#issuecomment-72906431) and it'd be great if it was up to date but [it's been rotting](https://github.com/rust-lang/rust/issues/22379) and this is a tiny bit of that.

Thanks!!!!!!