code: def generate(self):
      
      header = ' '.join('=' * self.width[i] for i in range(self.w))
      lines = [
          ' '.join(row[i].ljust(self.width[i]) for i in range(self.w))
          for row in self.rows]
      return [header] + lines + [header]
docs: Generate a list of strings representing the table in RST format.