nfc, refine comment

Author: Mel-Chen

llvm/lib/Transforms/Vectorize/VPlan.h

@@ -2578,7 +2578,7 @@ class LLVM_ABI_FOR_TEST VPInterleaveRecipe final : public VPInterleaveBase {
 
 /// A recipe for interleaved access operations with vector-predication
 /// intrinsics. The first operand is the address, the second operand is the
-/// explicit vector length . Stored values and mask are optional operands.
+/// explicit vector length. Stored values and mask are optional operands.
 class LLVM_ABI_FOR_TEST VPInterleaveEVLRecipe final : public VPInterleaveBase {
 public:
   VPInterleaveEVLRecipe(VPInterleaveRecipe &R, VPValue &EVL, VPValue *Mask)