Method replace

crates/wtf8/src/lib.rs:1177–1180

(&self, from: &Wtf8, to: &Wtf8)

    }

    pub fn replace(&self, from: &Wtf8, to: &Wtf8) -> Wtf8Buf {
        let w = self.bytes.replace(from, to);
        unsafe { Wtf8Buf::from_bytes_unchecked(w) }
    }

    pub fn replacen(&self, from: &Wtf8, to: &Wtf8, n: usize) -> Wtf8Buf {
        let w = self.bytes.replacen(from, to, n);