anchor.diff:     */
     static const CompileTimeErrorCode CONFLICTING_TYPE_VARIABLE_AND_CLASS =
         const CompileTimeErrorCode('CONFLICTING_TYPE_VARIABLE_AND_CLASS',
  -          "'{0}' cannot be used to name a type varaible in a class with the same name");
  +          "'{0}' cannot be used to name a type variable in a class with the same name");
   
     /**
      * 7. Classes: It is a compile time error if a generic class declares a type
  
positive.code:    */
    static const CompileTimeErrorCode CONFLICTING_TYPE_VARIABLE_AND_MEMBER =
        const CompileTimeErrorCode('CONFLICTING_TYPE_VARIABLE_AND_MEMBER',
            "'{0}' cannot be used to name a type varaible and member in this class");
  
    /**
     * 12.11.2 Const: It is a compile-time error if evaluation of a constant
  
negative.code:       "The stack trace variable '{0}' is not used and can be removed");
  
    /**
     * Unused local variables are local variables which are never read.
     */
    static const HintCode UNUSED_LOCAL_VARIABLE = const HintCode(
        'UNUSED_LOCAL_VARIABLE',
  