6a954f55 - Revert "Try using withContiguousStorageIfAvailable in RangeReplaceableCollection.append(contentsOf:) before falling back to a slow element-by-element loop. Fixes rdar://109059874"
Revert "Try using withContiguousStorageIfAvailable in RangeReplaceableCollection.append(contentsOf:) before falling back to a slow element-by-element loop. Fixes rdar://109059874"
This reverts commit 465aa22b81d96514f1813787fdfe9f23375deadc.