code: def check_multi_line_summary_start(self, definition, docstring):
          
          if docstring:
              start_triple = [
                  '"""', "'''",
                  'u"""', "u'''",
                  'r"""', "r'''",
                  'ur"""', "ur'''"
              ]
  
              lines = ast.literal_eval(docstring).split('\n')
              if len(lines) > 1:
                  first = docstring.split("\n")[0].strip().lower()
                  if first in start_triple:
                      return violations.D212()
                  else:
                      return violations.D213()
docs: D21{2,3}: Multi-line docstring summary style check.
  
          A multi-line docstring summary should start either at the first,
          or separately at the second line of a docstring.