On Sunday, after morning service, the separation, so agreeable to almost all, took place. Miss Bingley's civility to Elizabeth increased at last very rapidly, as well as her affection for Jane; and when they parted, after assuring the latter of the pleasure it would always give her to see her either at Longbourn or Netherfield, and embracing her most tenderly, she even shook hands with the former. -- Elizabeth took leave of the whole party in the liveliest spirits.
请教老师:
the pleasure it would always give her to see her either 这里应该是the pleasure (it would always give her) to see her either, 那么it would always give her应该怎么分析?其中it指代什么,或还是形式主语虚指呢?