[Modify] Polish it

websocket-sharp/Server/HttpServer.cs

@@ -492,9 +492,9 @@ namespace WebSocketSharp.Server
     /// authenticate a client.
     /// </summary>
     /// <value>
-    /// A <c>Func&lt;<see cref="IIdentity"/>, <see cref="NetworkCredential"/>&gt;</c> delegate that
+    /// A <c>Func&lt;<see cref="IIdentity"/>, <see cref="NetworkCredential"/>&gt;</c> delegate
-    /// references the method(s) used to find the credentials. The default value is a function that
+    /// that references the method(s) used to find the credentials. The default value is
-    /// only returns <see langword="null"/>.
+    /// <see langword="null"/>.
     /// </value>
     public Func<IIdentity, NetworkCredential> UserCredentialsFinder {
       get {