nl_tokens: [ a . b . c d ] - > [ a b c d ]
pl_tokens: function splitDots ( list ) { var result = [ ] ; <mask> . forEach ( function ( x ) { if ( typeof x === 'string' ) { x . split ( '.' ) . forEach ( function ( part ) { result . push ( part ) ; } ) ; } else { result . push ( x ) ; } } ) ; return result ; }