message: Stop `expand-all-collapsed-code` with `esc`
diff: @@ -14,11 +14,20 @@ const expandingCodeObserver = new MutationObserver(([mutation]) => {
  }
  });
  +function disconnectOnEscape(event: KeyboardEvent): void {
  + if (event.key === 'Escape') {
  + document.body.removeEventListener('keyup', disconnectOnEscape);
  + expandingCodeObserver.disconnect();
  + }
  +}
  +
  function handleAltClick(event: DelegateEvent<MouseEvent, HTMLButtonElement>): void {
  if (!event.altKey) {
  return;
  }
  + document.body.addEventListener('keyup', disconnectOnEscape);
  +
  expandingCodeObserver.observe(
  event.delegateTarget.closest('.diff-table > tbody')!,
  {childList: true}
  