[mediaqueries] Intuitive definition for custom media

Generally variable name is thought to be replaced. But custom media is 
not; The brackets surrounding it are removed when it is really used in 
'@media'.
For intuition, it should be defined in brackets from the first.

Now:
@custom-media = <extension-name> [ <media-query-list> | true | false ] ;

To:
@custom-media = ( <extension-name> ) [ <media-query-list> | true | false ] ;

Received on Monday, 18 May 2015 11:30:09 UTC