nl_tokens: Processes tree node .
pl_tokens: function ( ast ) { var lastChild = ast . <mask> ( ) ; if ( lastChild . is ( 'space' ) ) { lastChild . content = trim ( lastChild . content ) . replace ( / [ \t]+$ / , '' ) . replace ( / [\n]+ / g , '\n' ) ; } ast . traverseByType ( 'space' , function ( space ) { space . content = trim ( space . content ) ; } ) ; }