[InstCombine] Remove trailing space in comment; NFC

Author: goldsteinn

llvm/lib/Transforms/InstCombine/InstCombineSimplifyDemanded.cpp

@@ -918,7 +918,7 @@ Value *InstCombinerImpl::SimplifyDemandedUseBits(Value *V, APInt DemandedMask,
               SimplifyDemandedBits(I, 1, DemandedMaskRHS, RHSKnown, Depth + 1))
             return I;
         } else { // fshl is a rotate
-          // Avoid converting rotate into funnel shift. 
+          // Avoid converting rotate into funnel shift.
           // Only simplify if one operand is constant.
           LHSKnown = computeKnownBits(I->getOperand(0), Depth + 1, I);
           if (DemandedMaskLHS.isSubsetOf(LHSKnown.Zero | LHSKnown.One) &&