code: def fix_repeating_arguments(self):
          
          either = [list(child.children) for child in transform(self).children]
          for case in either:
              for e in [child for child in case if case.count(child) > 1]:
                  if type(e) is Argument or type(e) is Option and e.argcount:
                      if e.value is None:
                          e.value = []
                      elif type(e.value) is not list:
                          e.value = e.value.split()
                  if type(e) is Command or type(e) is Option and e.argcount == 0:
                      e.value = 0
          return self
docs: Fix elements that should accumulate/increment values.