Add abc.GuildChannel.clone to clone a channel with another name.

Fixes #2093

discord/channel.py

@@ -214,6 +214,15 @@ class TextChannel(discord.abc.Messageable, discord.abc.GuildChannel, Hashable):
         """
         await self._edit(options, reason=reason)
 
+    async def clone(self, *, name=None, reason=None):
+        return await self._clone_impl({
+            'topic': self.topic,
+            'nsfw': self.nsfw,
+            'rate_limit_per_user': self.slowmode_delay
+        }, name=name, reason=reason)
+
+    clone.__doc__ = discord.abc.GuildChannel.clone.__doc__
+
     async def delete_messages(self, messages):
         """|coro|
 
@@ -526,6 +535,14 @@ class VoiceChannel(discord.abc.Connectable, discord.abc.GuildChannel, Hashable):
 
     permissions_for.__doc__ = discord.abc.GuildChannel.permissions_for.__doc__
 
+    async def clone(self, *, name=None, reason=None):
+        return await self._clone_impl({
+            'bitrate': self.bitrate,
+            'user_limit': self.user_limit
+        }, name=name, reason=reason)
+
+    clone.__doc__ = discord.abc.GuildChannel.clone.__doc__
+
     async def edit(self, *, reason=None, **options):
         """|coro|
 
@@ -629,6 +646,13 @@ class CategoryChannel(discord.abc.GuildChannel, Hashable):
         """Checks if the category is NSFW."""
         return self.nsfw
 
+    async def clone(self, *, name=None, reason=None):
+        return await self._clone_impl({
+            'nsfw': self.nsfw
+        }, name=name, reason=reason)
+
+    clone.__doc__ = discord.abc.GuildChannel.clone.__doc__
+
     async def edit(self, *, reason=None, **options):
         """|coro|
 
@@ -791,6 +815,13 @@ class StoreChannel(discord.abc.GuildChannel, Hashable):
         """Checks if the channel is NSFW."""
         return self.nsfw
 
+    async def clone(self, *, name=None, reason=None):
+        return await self._clone_impl({
+            'nsfw': self.nsfw
+        }, name=name, reason=reason)
+
+    clone.__doc__ = discord.abc.GuildChannel.clone.__doc__
+
     async def edit(self, *, reason=None, **options):
         """|coro|