ref: db5d849be4549bf431b61670ca2ea71f144a8aca
parent: 112a91646c0597cdc2db4231efc15a7f31992ee3
author: phil9 <telephil9@gmail.com>
date: Tue Dec 28 11:10:29 EST 2021
recompute buf lines after edition this would make the scrollbar using wrong bounds to compute its size and scrolling