!fixup update comment

Author: fhahn

llvm/lib/Transforms/Vectorize/VPlanRecipes.cpp

@@ -1270,7 +1270,7 @@ bool VPInstruction::onlyFirstLaneUsed(const VPValue *Op) const {
   case VPInstruction::BuildVector:
     // Before replicating by VF, Build(Struct)Vector uses all lanes of the
     // operand, after replicating its operands only the first lane is used.
-    // Before replicating, it will only have a single operand.
+    // Before replicating, it will have only a single operand.
     return getNumOperands() > 1;
   case VPInstruction::PtrAdd:
     return Op == getOperand(0) || vputils::onlyFirstLaneUsed(this);