Comment change to verify commit rights. NFC.

[JesperAntonsson]

Summary

Just a silly one-character correction.

lib/Transforms/Utils/SimplifyCFG.cpp

 /// practice, the optimizer produces empty landing pad blocks quite frequently
 /// when dealing with exception dense code.  (see: instcombine, gvn, if-else
 /// sinking in this file)
 ///
 /// This is primarily a code size optimization.  We need to avoid performing
 /// any transform which might inhibit optimization (such as our ability to
 /// specialize a particular handler via tail commoning).  We do this by not
 /// merging any blocks which require us to introduce a phi.  Since the same
-/// values are flowing through both blocks, we don't loose any ability to
+/// values are flowing through both blocks, we don't lose any ability to
 /// specialize.  If anything, we make such specialization more likely.
 ///
 /// TODO - This transformation could remove entries from a phi in the target
 /// block when the inputs in the phi are the same for the two blocks being
 /// merged.  In some cases, this could result in removal of the PHI entirely.
 static bool TryToMergeLandingPad(LandingPadInst *LPad, BranchInst *BI,
                                  BasicBlock *BB) {
   auto Succ = BB->getUniqueSuccessor();