docs: def format_line(line):
      """
      Format a line of Matlab into either a markdown line or a code line.
  
      Parameters
      ----------
      line : str
          The line of code to be formatted. Formatting occurs according to the
          following rules:
  
          - If the line starts with (at least) two %% signs, a new cell will be
            started.
  
          - If the line doesn't start with a '%' sign, it is assumed to be legit
            matlab code. We will continue to add to the same cell until reaching
            the next comment line
      """
      if line.startswith('%%'):
          md = True
          new_cell = True
          source = line.split('%%')[1] + '\n'  # line-breaks in md require a line
                                               # gap!
  
      elif line.startswith('%'):
          md = True
          new_cell = False
          source = line.split('%')[1] + '\n'
  
      else:
          md = False
          new_cell = False
          source = line
  
  
      return new_cell, md, source