anchor.diff:  media
   	: MEDIA_SYM^ media_query_list?
   		LBRACE!
  -			bodyset*    // This is from CSS3
  +			body*    // This is from CSS3
   		RBRACE!
   	;
   
  
positive.code: // ---------
  // Body
  //
  bodylist
  	: bodyset*
  	;
  
  bodyset
  	: ruleSet
  	| media
  	| page
  
negative.code: //
  media_query_list
  	: media_query (COMMA media_query)*
  		-> ^(N_MediaQuery media_query) +
  	;
  
  // We are not studying content of media query (as AND, NOT and ONLY tokens are not recognized)
  