code: def go_to_next_cell(self):
          
          cursor = self.textCursor()
          cursor.movePosition(QTextCursor.NextBlock)
          cur_pos = prev_pos = cursor.position()
          while not self.is_cell_separator(cursor):
              # Moving to the next code cell
              cursor.movePosition(QTextCursor.NextBlock)
              prev_pos = cur_pos
              cur_pos = cursor.position()
              if cur_pos == prev_pos:
                  return
          self.setTextCursor(cursor)
docs: Go to the next cell of lines