anchor.diff:      let printArg = function
           | Some(attr) -> "["+(Source.toString attr)+"]"
           | None -> ""
  -    let printListBrackets  l_br r_br metaArgs = if (List.isEmpty metaArgs) then "" else l_br+(String.concat " " (List.map Source.toString metaArgs))+r_br
  +    let printListBrackets  l_br r_br metaArgs =
  +        if (List.isEmpty metaArgs) then ""
  +        else l_br + (String.concat " " (List.map Source.toString metaArgs)) + r_br
       let printMetaArgs = printListBrackets "<<" ">>"
       let printArgs = printListBrackets "[" "]"
       let rec priority = function 
  
positive.code:                     (str_acc+word, true, 0)
              else
                  let spaces_count = if newline then ident else 2
                  if (String.length word<=windowSize-chars_in_line-spaces_count) then
                      let appended = (String.replicate spaces_count " ")+word
                      (str_acc+appended,false, chars_in_line+(String.length appended))
                  else
                      let newlineStr = (String.replicate (ident+splitTabSize) " ")+word
                      (str_acc+"\n"+newlineStr,false, String.length newlineStr)
              ) ("", true, 0) strList
      text
  
  let printRule (rule:Rule.t<Source.t,Source.t>) = 
      let bracketsIf cond s = if cond then [Str("(")]@s@[Str(")")] else s
      let startSign = if rule._public then "+" else ""
      let printAttr = function
          | Some(attr) -> "{"+(Source.toString attr)+"}"
  
negative.code:     let rec printProduction (production:Production.t<Source.t,Source.t>) = 
          let printElem (elem:elem<Source.t,Source.t>) = 
              let binding = function
                  | Some x when String.forall System.Char.IsLetter (Source.toString x) -> (Source.toString x) + "="
                  | Some x  -> "<" + Source.toString x + ">="
                  | None -> ""
              let omit = if elem.omit then "-" else ""
              let needBrackets =  let prio = priority elem.rule in if elem.binding.IsSome then prio < 50 else prio = 1
              seq { yield Str(omit + binding elem.binding); yield! bracketsIf  needBrackets (printProduction elem.rule) }
          match production with
          | PAlt(alt1, alt2) -> seq {yield Tabbed(printProduction alt1); yield Line (seq {yield Str ("| "); yield! printProduction alt2})} //Альтернатива
          | PSeq(elem_seq,attr_option) -> seq {yield! (Seq.collect printElem elem_seq); yield Str(printAttr attr_option)} //Последовательность * атрибут.(атрибут всегда применяется к последовательности) 
          | PToken(source) -> to_seq <| Str (Source.toString source) //собственно токен
          | PRef(source, attr_option) -> to_seq <| Str (Source.toString source + printArg attr_option)  //Vanilla rule reference with an optional args list.
          | PMany(many) -> seq { yield! bracketsIf (priority many < 50) (printProduction many) ; yield Str "*"} //expr*
          | PMetaRef(rule_name, opt_arg, metaArgs) -> to_seq <| Str((Source.toString rule_name)+(printMetaArgs metaArgs)+(printArg opt_arg)) // Metarule reference like in "a: mr<x> y z"
          | PLiteral(source) -> to_seq <| Str (Source.toString source) //Литерал. Хочется в правилах явно писать ,например, .."if" expr "then" expr...
  //        |PRepet   of (t<'patt,'expr>) * int option * int option  //extended regexp repetition, "man egrep" for details
  //        |PPerm    of (t<'patt,'expr>) list //permutation (A || B || C)   
  ///// The following are obsolete and reduction to PRepet should be discussed.
          | PSome(some) -> seq {yield! (bracketsIf (priority some<50) (printProduction some)); yield Str("+")} //expr+
          | POpt(opt) -> seq {yield! (bracketsIf (priority opt<50) (printProduction opt)); yield Str("?")} //expr?
          | _ -> to_seq <| Str("ERROR")
  
      seq {yield Line(to_seq <| Str(startSign+rule.name+(printMetaArgs rule.metaArgs)+(printArgs rule.args)+": "));
          yield Tabbed(seq{yield! printProduction rule.body; yield Str(";")})}
  
  let generate (input_grammar:Definition.t<Source.t,Source.t>) =
      let tbSeq = Seq.collect (fun rule -> printRule rule) input_grammar.grammar
      printSourceOpt(input_grammar.head)+(printTextBox 4 4 80 tbSeq)+printSourceOpt(input_grammar.foot)
  