Encoding#replicate

static VALUE
enc_replicate_m(VALUE encoding, VALUE name)
{
    int idx;
    rb_warn_deprecated_to_remove("3.3", "Encoding#replicate", "the original encoding");

    idx = rb_enc_replicate(name_for_encoding(&name), rb_to_encoding(encoding));
    RB_GC_GUARD(name);
    return rb_enc_from_encoding_index(idx);
}