docs: update xmldoc for allowedMentions args

src/Discord.Net.Commands/ModuleBase.cs

@@ -31,7 +31,10 @@ namespace Discord.Commands
         /// </param>
         /// <param name="isTTS">Specifies if Discord should read this <paramref name="message"/> aloud using text-to-speech.</param>
         /// <param name="embed">An embed to be displayed alongside the <paramref name="message"/>.</param>
-        /// <param name="allowedMentions">The types of mention notifications that will be sent with this message.</param>
+        /// <param name="allowedMentions">
+        ///     Specifies if notifications are sent for mentioned users and roles in the message <paramref name="text"/>.
+        ///     If <c>null</c>, all mentioned roles and users will be notified.
+        /// </param>
         protected virtual async Task<IUserMessage> ReplyAsync(string message = null, bool isTTS = false, Embed embed = null, RequestOptions options = null, AllowedMentions allowedMentions = null)
         {
             return await Context.Channel.SendMessageAsync(message, isTTS, embed, options, allowedMentions).ConfigureAwait(false);

src/Discord.Net.Core/Entities/Channels/IMessageChannel.cs

@@ -23,7 +23,10 @@ namespace Discord
         /// <param name="isTTS">Determines whether the message should be read aloud by Discord or not.</param>
         /// <param name="embed">The <see cref="Discord.EmbedType.Rich"/> <see cref="Embed"/> to be sent.</param>
         /// <param name="options">The options to be used when sending the request.</param>
-        /// <param name="allowedMentions">The types of mention notifications that will be sent with this message.</param>
+        /// <param name="allowedMentions">
+        ///     Specifies if notifications are sent for mentioned users and roles in the message <paramref name="text"/>. If <c>null</c>, all mentioned roles and users will be notified. If <c>null</c>, all mentioned roles and users will be notified.Specifies if notifications are sent for mentioned users and roles in the message <paramref name="text"/>.
+        ///     If <c>null</c>, all mentioned roles and users will be notified.
+        /// </param>
         /// <returns>
         ///     A task that represents an asynchronous send operation for delivering the message. The task result
         ///     contains the sent message.

src/Discord.Net.Core/Extensions/UserExtensions.cs

@@ -28,7 +28,10 @@ namespace Discord
         /// <param name="isTTS">Whether the message should be read aloud by Discord or not.</param>
         /// <param name="embed">The <see cref="EmbedType.Rich"/> <see cref="Embed"/> to be sent.</param>
         /// <param name="options">The options to be used when sending the request.</param>
-        /// <param name="allowedMentions">The types of mention notifications that will be sent with this message.</param>
+        /// <param name="allowedMentions">
+        ///     Specifies if notifications are sent for mentioned users and roles in the message <paramref name="text"/>.
+        ///     If <c>null</c>, all mentioned roles and users will be notified.
+        /// </param>
         /// <returns>
         ///     A task that represents the asynchronous send operation. The task result contains the sent message.
         /// </returns>

src/Discord.Net.Rest/Entities/Channels/IRestMessageChannel.cs

@@ -20,7 +20,10 @@ namespace Discord.Rest
         /// <param name="isTTS">Determines whether the message should be read aloud by Discord or not.</param>
         /// <param name="embed">The <see cref="Discord.EmbedType.Rich"/> <see cref="Embed"/> to be sent.</param>
         /// <param name="options">The options to be used when sending the request.</param>
-        /// <param name="allowedMentions">The types of mention notifications that will be sent with this message.</param>
+        /// <param name="allowedMentions">
+        ///     Specifies if notifications are sent for mentioned users and roles in the message <paramref name="text"/>.
+        ///     If <c>null</c>, all mentioned roles and users will be notified.
+        /// </param>
         /// <returns>
         ///     A task that represents an asynchronous send operation for delivering the message. The task result
         ///     contains the sent message.

src/Discord.Net.WebSocket/Entities/Channels/ISocketMessageChannel.cs

@@ -28,7 +28,10 @@ namespace Discord.WebSocket
         /// <param name="text">The message to be sent.</param>
         /// <param name="isTTS">Determines whether the message should be read aloud by Discord or not.</param>
         /// <param name="embed">The <see cref="Discord.EmbedType.Rich"/> <see cref="Embed"/> to be sent.</param>
-        /// <param name="allowedMentions">The types of mention notifications that will be sent with this message.</param>
+        /// <param name="allowedMentions">
+        ///     Specifies if notifications are sent for mentioned users and roles in the message <paramref name="text"/>.
+        ///     If <c>null</c>, all mentioned roles and users will be notified.
+        /// </param>
         /// <param name="options">The options to be used when sending the request.</param>
         /// <returns>
         ///     A task that represents an asynchronous send operation for delivering the message. The task result