Clean up

aspnetcore/grpc/protobuf.md

@@ -133,7 +133,7 @@ message Person {
 }
 ```
 
-`wrappers.proto` types aren't exposed in generated properties. Protobuf automatically maps them to appropriate .NET nullable types when generating C# messages. For example, a `google.protobuf.Int32Value` field generates a `int?` property. Reference type properties like `string` and `ByteString` are unchanged except `null` can be assigned to them without error.
+`wrappers.proto` types aren't exposed in generated properties. Protobuf automatically maps them to appropriate .NET nullable types in C# messages. For example, a `google.protobuf.Int32Value` field generates a `int?` property. Reference type properties like `string` and `ByteString` are unchanged except `null` can be assigned to them without error.
 
 The following table shows the complete list of wrapper types with their equivalent C# type:
 
@@ -162,7 +162,7 @@ var payload = new PayloadResponse();
 payload.Data = ByteString.CopyFrom(data);
 ```
 
-A `ByteString`s data can be accessed directly using `ByteString.Span` or `ByteString.Memory`. Or call `ByteString.ToByteArray()` to convert an instance back into a byte array:
+`ByteString` data is accessed directly using `ByteString.Span` or `ByteString.Memory`. Or call `ByteString.ToByteArray()` to convert an instance back into a byte array:
 
 ```csharp
 var payload = await client.GetPayload(new PayloadRequest());