Add tracking issue for the `matches!` macro
Add tracking issue for the `matches!` macro

https://github.com/rust-lang/rust/issues/65721

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