message: Added two more unit tests for U undo/redo.
diff: @@ -1266,6 +1266,20 @@ suite('Mode Normal', () => {
  end: ['ab|c', 'def'],
  });
  + newTest({
  + title: "Can handle 'u' to undo 'U'",
  + start: ['|'],
  + keysPressed: 'iabc<Esc>Uu',
  + end: ['|abc'],
  + });
  +
  + newTest({
  + title: "Can handle 'U' to undo 'U'",
  + start: ['|'],
  + keysPressed: 'iabc<Esc>UU',
  + end: ['|abc'],
  + });
  +
  newTest({
  title: 'Redo',
  start: ['|'],
  