[mlir] NFC: tiny fix in comment.

Reviewed By: ftynse, mehdi_amini

Differential Revision: https://reviews.llvm.org/D91430

mlir/include/mlir/IR/StandardTypes.h

@@ -682,8 +682,8 @@ inline bool TensorType::classof(Type type) {
 /// outer dimension is `1` and the distance between two consecutive elements
 /// along the inner dimension is `64`.
 ///
-/// If a simple strided form cannot be extracted from the composition of the
-/// layout map, returns llvm::None.
+/// Returns whether a simple strided form can be extracted from the composition
+/// of the layout map.
 ///
 /// The convention is that the strides for dimensions d0, .. dn appear in
 /// order to make indexing intuitive into the result.

mlir/include/mlir/IR/Types.h

@@ -118,7 +118,7 @@ public:
   /// dynamic type casting.
   TypeID getTypeID() { return impl->getAbstractType().getTypeID(); }
 
-  /// Return the LLVMContext in which this type was uniqued.
+  /// Return the MLIRContext in which this type was uniqued.
   MLIRContext *getContext() const;
 
   /// Get the dialect this type is registered to.