code: def simplify_soc_marker(self, text, prev_text):
          
          if self.cell_marker_start:
              return text
  
          if self.is_code() and text and text[0] == self.comment + ' + {}':
              if not prev_text or not prev_text[-1].strip():
                  text[0] = self.comment + ' +'
  
          return text
docs: Simplify start of cell marker when previous line is blank