Use `with` in `Symbol` trait methods.
Use `with` in `Symbol` trait methods.

Instead of `as_str()`, which unnecessarily involves `LocalInternedString`.

aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,aidancully/rust,graydon/rust,graydon/rust,aidancully/rust,graydon/rust