convert_sig (MusicBrainz::TRM)

    /*
     * Convert 16-byte raw signature into a human-readable 36-byte ASCII string.
     *
     * Used after MusicBrainz::TRM#generate_signature has returned true and
     * MusicBrainz::TRM#finalize_signature has returned a signature.
     *
     * Aliases:
     *   MusicBrainz::TRM#sig_to_ascii
     *   MusicBrainz::TRM#convert_sig_to_ascii
     *
     * Examples:
     *   puts 'signature: ' << trm.convert_sig raw_sig
     *
     */
    static VALUE mb_trm_convert_sig(VALUE self, VALUE sig) {