fix typo error in DivergenceAnalysis.h

[drcut]

Summary

Fix a typo error in the comment in DivergenceAnalysis.h

llvm/include/llvm/Analysis/DivergenceAnalysis.h

 class DivergenceAnalysisImpl {
 public:
   /// \brief This instance will analyze the whole function \p F or the loop \p
   /// RegionLoop.
   ///
   /// \param RegionLoop if non-null the analysis is restricted to \p RegionLoop.
   /// Otherwise the whole function is analyzed.
   /// \param IsLCSSAForm whether the analysis may assume that the IR in the
-  /// region in in LCSSA form.
+  /// region in LCSSA form.
   DivergenceAnalysisImpl(const Function &F, const Loop *RegionLoop,
                          const DominatorTree &DT, const LoopInfo &LI,
                          SyncDependenceAnalysis &SDA, bool IsLCSSAForm);
 
   /// \brief The loop that defines the analyzed region (if any).
   const Loop *getRegionLoop() const { return RegionLoop; }
   const Function &getFunction() const { return F; }