def lines.merge
import gralha-coverage@0.1.0.1/cover.bend as Coverimport Base
497def lines.merge(xs: List<&2, CovLine>, ys: List<&2, CovLine>) -> List<&2, CovLine>:
498 match xs:
499 case Nil{}: ys
500 case Con{x, xt}:
501 match ys:
502 case Nil{}: Con{x, xt}
503 case Con{y, yt}: lines.merge.go(lines.order(x, xt, y, yt))