anchor.diff:  CASE:               'case';
   CHAR:               'char';
   COFIGURATION:       'configuration';
  -COMMAND:            'command'; 
  +COMMAND:            'command';
   COMPONENT:          'component';
   COMPONENTS:         'components';
   CONTINUE:           'continue';
  
positive.code: ;
  
  FLOAT
  : [0-9]+ '.' [0-9]* 
  | '.' [0-9]+
  ;
  
  
negative.code: GENERIC:            'generic';
  IF:                 'if';
  IMPLEMENTATION:     'implementation';
  INCLUDE:            'include';
  INCLUDES:           'includes';
  INTERFACE:          'interface';
  LOG:                'log';
  