lint: clean up whitespace

src/Discord.Net.Core/Utils/TokenUtils.cs

@@ -28,6 +28,9 @@ namespace Discord
         /// </returns>
         internal static bool CheckBotTokenValidity(string message)
         {
+            if (string.IsNullOrWhiteSpace(message))
+                return false;
+
             // split each component of the JWT
             var segments = message.Split('.');