anchor.diff:    Terminators;
   
   handle_terminator({ E, Line }, _) when
  +    E == 'end';
       E == ')';
       E == ']';
       E == '}';
  
positive.code: sigil_terminator($<) -> $>;
  sigil_terminator(O) -> O.
  
  handle_terminator({ S, _ } = New, Terminators) when
      S == '(';
      S == '[';
      S == '{';
  
negative.code: handle_terminator(_, Terminators) ->
    Terminators.
  
  terminator('fn') -> 'end';
  terminator('do') -> 'end';
  terminator('(')  -> ')';
  terminator('[')  -> ']';
  terminator('{')  -> '}';
  terminator('<<') -> '>>'.
  
  % Keywords check
  keyword(Line, paren_identifier, fn, Tokens) ->
    [{ 'fn_paren', Line }|Tokens];
  
  