[gardening] Fix inconsistent header.

Author: practicalswift

lib/SILOptimizer/Utils/PerformanceInlinerUtils.cpp

@@ -1,4 +1,4 @@
-//===----- PeformanceInlinerUtils.cpp - Peformance inliner utilities. -----===//
+//===--- PeformanceInlinerUtils.cpp - Peformance inliner utilities. -------===//
 //
 // This source file is part of the Swift.org open source project
 //
@@ -533,4 +533,4 @@ void ShortestPathAnalysis::Weight::updateBenefit(int &Benefit,
   // We don't accumulate the benefit instead we max it.
   if (newBenefit > Benefit)
     Benefit = newBenefit;
-}
+}