Function punctuation

backend/src/git/search.rs:573–576

()

    #[test]
    fn punctuation() {
        let search = Search::parse("one.!?:`#$@*&;+-{}[]()/\\'\",=    <> two").unwrap();
        assert_eq!(search.tokens, phrases(&["one", "two"]));
    }

    #[test]
    fn uppercase_letters() {