nl_tokens: preview a system deploy
pl_tokens: function ( user , identifier , revisionIdentifier , target , out , cb ) { logger . <mask> ( 'preview revision: ' + identifier + ', ' + revisionIdentifier + ' ' + target ) ; deployRevision ( user , identifier , revisionIdentifier , target , 'preview' , out , function ( err ) { cb ( err , { plan : out . getPlan ( ) , ops : out . operations ( ) } ) ; } ) ; }