message: Generate and render new rows only when doing a full erase-in-display command, but not when erasing above/below.
diff: @@ -2806,7 +2806,6 @@ export class Emulator implements EmulatorApi {
  this.eraseRight(this.x, this.y);
  j = this.y + 1;
  for (; j < this.rows; j++) {
  - this._getRow(j);
  this.eraseLine(j);
  }
  break;
  @@ -2814,7 +2813,6 @@ export class Emulator implements EmulatorApi {
  this.eraseLeft(this.x, this.y);
  j = this.y;
  while (j--) {
  - this._getRow(j);
  this.eraseLine(j);
  }
  break;
  