Method title

crates/vm/src/builtins/str.rs:1013–1038

(&self)

    #[pymethod]
    fn title(&self) -> Wtf8Buf {
        let mut title = Wtf8Buf::with_capacity(self.data.len());
        let mut previous_is_cased = false;
        for c_orig in self.as_wtf8().code_points() {
            let c = c_orig.to_char_lossy();
            if c.is_lowercase() {
                if !previous_is_cased {
                    title.extend(c.to_titlecase());
                } else {
                    title.push_char(c);
                }
                previous_is_cased = true;
            } else if c.is_uppercase() || c.is_titlecase() {
                if previous_is_cased {
                    title.extend(c.to_lowercase());
                } else {
                    title.push_char(c);
                }
                previous_is_cased = true;
            } else {
                previous_is_cased = false;
                title.push(c_orig);
            }
        }
        title
    }

    #[pymethod]
    fn swapcase(&self) -> Wtf8Buf {