Merge branch 'master' into swift4.2-update

Author: laurentaylormarshall

Slow Sort/SlowSort.playground/Contents.swift

@@ -1,4 +1,4 @@
 var numberList = [1, 12, 9, 17, 13, 12]
 
-slowsort(0, numberList.count-1, &numberList)
+slowSort(0, numberList.count-1, &numberList)
 print(numberList)

Slow Sort/SlowSort.swift

@@ -5,6 +5,7 @@
 //  Created by Pope Lukas Schramm (Dabendorf Orthodox Religion) on 16-07-16.
 //
 //
+
 func slowSort(_ i: Int, _ j: Int, _ numberList: inout [Int]) {
     guard if i < j else { return }
     let m = (i+j)/2