Merge pull request apple#7 from e28eta/patch-2

Update documentation typo: double ‘the’

Sources/Atomics/AtomicMemoryOrderings.swift

@@ -43,7 +43,7 @@ extension AtomicLoadOrdering {
 
   /// An acquiring load synchronizes with a releasing operation whose
   /// value its reads. It ensures that the releasing and acquiring
-  /// threads agree that all subsequent variable accesses on the the
+  /// threads agree that all subsequent variable accesses on the
   /// acquring thread happen after the atomic operation itself.
   ///
   /// This value corresponds to `std::memory_order_acquire` in C++.