Fix recently introduced typo.

Author: practicalswift

include/swift/SILOptimizer/Analysis/EscapeAnalysis.h

@@ -742,7 +742,7 @@ class EscapeAnalysis : public BottomUpIPAnalysis {
 
   /// Returns true if the pointers \p V1 and \p V2 can possibly point to the
   /// same memory.
-  /// If at aleast one of the pointers refers to a local object and and the
+  /// If at least one of the pointers refers to a local object and the
   /// connection-graph-nodes of both pointers do not point to the same content
   /// node, the pointers do not alias.
   bool canPointToSameMemory(SILValue V1, SILValue V2);