code: def p_single_line_if(p):
      
      cond_ = p[1]
      stat_ = p[2]
      p[0] = make_sentence('IF', cond_, stat_, lineno=p.lineno(1))
docs: if_inline : if_then_part statements %prec ID
                    | if_then_part co_statements_co %prec NEWLINE
                    | if_then_part statements_co %prec NEWLINE
                    | if_then_part co_statements %prec ID