Use guard instead of if for early return

Author: mdznr

Sources/Algorithms/Rotate.swift

@@ -58,7 +58,7 @@ extension MutableCollection where Self: BidirectionalCollection {
   /// - Complexity: O(*n*), where *n* is the length of `subrange`.
   @inlinable
   public mutating func reverse(subrange: Range<Index>) {
-    if subrange.isEmpty { return }
+    guard !subrange.isEmpty else { return }
     var lower = subrange.lowerBound
     var upper = subrange.upperBound
     while lower < upper {