wait on rustfmt stable feature wrap_comments (rust-lang/rustfmt#3347)

Enable `wrap_comments` in [`rustfmt.toml`](https://github.com/jtmoon79/super-speedy-syslog-searcher/blob/0.0.32/rustfmt.toml#L31), tracking Issue https://github.com/rust-lang/rustfmt/issues/3347

https://rust-lang.github.io/rustfmt/?version=v1.5.1&search=#wrap_comments