message: fix error in using num+gg movements if num is larger than the document
  line count
diff: @@ -1127,8 +1127,9 @@ class MoveNonBlankFirst extends BaseMovement {
  ): Promise<Position | IMovement> {
  if (count === 0) {
  return position.getDocumentBegin().getFirstLineNonBlankChar();
  + } else if (count > TextEditor.getLineCount()) {
  + count = TextEditor.getLineCount();
  }
  -
  return new Position(count - 1, 0).getFirstLineNonBlankChar();
  }
  }
  