fix CA1834

DepotDownloader/HttpDiagnosticEventListener.cs

@@ -1,4 +1,4 @@
-using System;
+using System;
 using System.Diagnostics.Tracing;
 using System.Text;
 
@@ -35,7 +35,7 @@ namespace DepotDownloader
                 }
             }
 
-            sb.Append(")");
+            sb.Append(')');
             Console.WriteLine(sb.ToString());
         }
     }