nl_tokens: Skips text nodes that only contain whitespace since they aren t semantically important .
pl_tokens: function skipWhitespaceNodes ( e , next ) { while ( e && ( e . nodeType === 8 || ( e . nodeType === 3 && / ^[ \t\n\r]*$ / . test ( e . nodeValue ) ) ) ) { e = <mask> ( e ) ; } return e ; }