def p_append_fast
import bend-osdev-bytes@0.1.1.0/PROOF.bend as PROOFimport Base
import bend-osdev-bytes@0.1.1.0/bytes.bend as B
537def p_append_fast(+xs: List<&2, U32>, +ys: List<&2, U32>) -> {B.append(xs, ys) == B.append.fast(xs, ys) : List<&2, U32>}:
538 Equal.sym(List<&2, U32>, B.append.fast(xs, ys), B.append(xs, ys), ru_rr(xs, Nil{}, ys))