update docs and add message replies

discord/ext/commands/context.py

@@ -332,3 +332,28 @@ class Context(discord.abc.Messageable):
                 return None
         except CommandError as e:
             await cmd.on_help_command_error(self, e)
+
+    async def reply(self, content=None, **kwargs): 
+        """|coro| 
+ 
+        A shortcut method to :meth:`~discord.abc.Messageable.send` to reply to the 
+        :class:`~discord.Message` that invoked the command. 
+ 
+            .. versionadded:: 1.5.1.5
+ 
+        Raises 
+        -------- 
+        ~discord.HTTPException 
+            Sending the message failed. 
+        ~discord.Forbidden 
+            You do not have the proper permissions to send the message. 
+        ~discord.InvalidArgument 
+            The ``files`` list is not of the appropriate size or 
+            you specified both ``file`` and ``files``. 
+ 
+        Returns 
+        --------- 
+        :class:`~discord.Message` 
+            The message that was sent. 
+        """ 
+        return await self.message.reply(content, **kwargs)