code: def strip_block_whitespace(string_list):
      
      min_ws = min([(len(x) - len(x.lstrip())) for x in string_list if x != '\n'])
      return [x[min_ws:] if x != '\n' else x for x in string_list]
docs: Treats a list of strings as a code block and strips
          whitespace so that the min whitespace line sits at char 0 of line.