swift234

stdlib: rename filtering sequence and collection wrappers to a common naming convention

  // Renamed from `FilterSequenceView`.
  struct FilterSequence<Base : SequenceType> { ... }

  // Renamed from `FilterCollectionViewIndex`.
  struct FilterCollectionIndex<Base : CollectionType> { ... }

  // Renamed from `FilterCollectionView`.
  struct FilterCollection<Base : CollectionType> { ... }

Part of rdar://21429126

Swift SVN r29630