anchor.diff:  literal
       : NullLiteral
       | BooleanLiteral
  -    | tjsStringLiteral
  +    | (StringLiteral | TemplateStringLiteral)+
       | octetLiteral
       | RegularExpressionLiteral
       | numericLiteral
  -    ;
  -
  -tjsStringLiteral // tjs can use C like string literal: "part1""part2"
  -    : (StringLiteral
  -    | TemplateStringLiteral)+
  +    | Void
       ;
   
   octetLiteral
  
positive.code:     ;
  
  statement
      : block
      | variableStatement
      | emptyStatement
      | classDeclaration
  
negative.code:     | throwStatement
      | tryStatement
      | debuggerStatement
      | function
      | property
      ;
  
  block
  