Fix formatting (#1039)

Author: Shane32

src/Transports.AspNetCore/WebSockets/GraphQLWs/SubscriptionServer.cs

@@ -196,10 +196,9 @@ await Connection.SendMessageAsync(new OperationMessage
  /// <inheritdoc/>
  protected override async Task<ExecutionResult> ExecuteRequestAsync(OperationMessage message)
  {
- var request = Serializer.ReadNode<GraphQLRequest>(message.Payload);
 #pragma warning disable CA2208 // Instantiate argument exceptions correctly
- if (request == null)
- throw new ArgumentNullException(nameof(message) + "." + nameof(OperationMessage.Payload));
+ var request = Serializer.ReadNode<GraphQLRequest>(message.Payload)
+ ?? throw new ArgumentNullException(nameof(message) + "." + nameof(OperationMessage.Payload));
 #pragma warning restore CA2208 // Instantiate argument exceptions correctly
  var scope = ServiceScopeFactory.CreateScope();
  try

src/Transports.AspNetCore/WebSockets/SubscriptionsTransportWs/SubscriptionServer.cs

@@ -174,10 +174,9 @@ await Connection.SendMessageAsync(new OperationMessage
  /// <inheritdoc/>
  protected override async Task<ExecutionResult> ExecuteRequestAsync(OperationMessage message)
  {
- var request = Serializer.ReadNode<GraphQLRequest>(message.Payload);
 #pragma warning disable CA2208 // Instantiate argument exceptions correctly
- if (request == null)
- throw new ArgumentNullException(nameof(message) + "." + nameof(OperationMessage.Payload));
+ var request = Serializer.ReadNode<GraphQLRequest>(message.Payload)
+ ?? throw new ArgumentNullException(nameof(message) + "." + nameof(OperationMessage.Payload));
 #pragma warning restore CA2208 // Instantiate argument exceptions correctly
  var scope = ServiceScopeFactory.CreateScope();
  try