title: How to edit a message in discord.py
body: <p>I would like to have my bot edit a message if it detects a keyword, i'm not sure how to edit the message though.</p>
  
  <p>I've looked through the documentation but can't seem to figure it out. I'm using discord.py with python 3.6.</p>
  
  <p>This is the code:</p>
  
  <pre><code>@bot.event
  async def on_message(message):
      if 'test' in message.content:
          await edit(message, "testtest")
  </code></pre>
  
  <p>This is the error:</p>
  
  <pre><code>  File "testthing.py", line 67, in on_message
      await edit(message, "test")
   NameError: name 'edit' is not defined
  </code></pre>
  
  <p>I would like the bot to edit a message to "testtest" if the message contains the word test, but i just get an error.</p>