Add on_message_edit event.

examples/edits.py

@@ -0,0 +1,16 @@
+import discord
+
+client = discord.Client()
+client.login('email', 'password')
+
+@client.event
+def on_ready():
+    print('Connected!')
+    print('Username: ' + client.user.name)
+    print('ID: ' + client.user.id)
+
+@client.event
+def on_message_edit(before, after):
+    client.send_message(after.channel, '**{}** edited their message:\n{}'.format(after.author.name, before.content))
+
+client.run()