Sentence:  ‘This new fashion of introducing the candidate's children into an election contest is a <WSD>pretty</WSD> one,' said Mrs. Panstreppon; ‘it takes away something from the acerbity of party warfare, and it makes an interesting experience for the children to look back on in after years.' 
Meaning of the word marked with <WSD> tags:  Excellent, commendable, pleasing; fitting or proper (of actions, thoughts etc.). (from 16th c.)