anchor.diff:   */
   
   /*
  -    This grammar is adapted from https://github.com/antlr/grammars-v4/tree/master/turtle,
  -    derived in turn from http://www.w3.org/TR/turtle/#sec-grammar-grammar,
  -    with the following copywright:
  -*/
  -/*
  + This grammar is adapted from https://github.com/antlr/grammars-v4/tree/master/turtle,
  + derived in turn from http://www.w3.org/TR/turtle/#sec-grammar-grammar,
  + with the following copywright:
  +
    [The "BSD licence"]
    Copyright (c) 2014, Alejandro Medrano (@ Universidad Politecnica de Madrid, http://www.upm.es/)
    All rights reserved.
  
positive.code:   : '"""' (('"' | '""')? (~ ["\\] | ECHAR | UCHAR | '\''))* '"""'
    ;
  
  // Extended with curly brackets, space and escaped characters
  STRING_LITERAL_QUOTE
    : '"' (~ ["\\\r\n] | '\'' | '\\"' | '{' | '}' | ' ' | ECHAR)* '"'
    ;
  
  //STRING_LITERAL_QUOTE
  //  : '"' (~ ["\\\r\n] | '\'' | '\\"')* '"'
  //  ;
  
  // not used
  STRING_LITERAL_SINGLE_QUOTE
  
negative.code: }
  
  
  /*------------------------------------------------------------------
   * PARSER RULES
   *------------------------------------------------------------------*/
  