code: def clean_content(self):
          
  
          transformations = {
              re.escape('<#%s>' % channel.id): '#' + channel.name
              for channel in self.channel_mentions
          }
  
          mention_transforms = {
              re.escape('<@%s>' % member.id): '@' + member.display_name
              for member in self.mentions
          }
  
          # add the <@!user_id> cases as well..
          second_mention_transforms = {
              re.escape('<@!%s>' % member.id): '@' + member.display_name
              for member in self.mentions
          }
  
          transformations.update(mention_transforms)
          transformations.update(second_mention_transforms)
  
          if self.guild is not None:
              role_transforms = {
                  re.escape('<@&%s>' % role.id): '@' + role.name
                  for role in self.role_mentions
              }
              transformations.update(role_transforms)
  
          def repl(obj):
              return transformations.get(re.escape(obj.group(0)), '')
  
          pattern = re.compile('|'.join(transformations.keys()))
          result = pattern.sub(repl, self.content)
  
          transformations = {
              '@everyone': '@\u200beveryone',
              '@here': '@\u200bhere'
          }
  
          def repl2(obj):
              return transformations.get(obj.group(0), '')
  
          pattern = re.compile('|'.join(transformations.keys()))
          return pattern.sub(repl2, result)
docs: A property that returns the content in a "cleaned up"
          manner. This basically means that mentions are transformed
          into the way the client shows it. e.g. ``<#id>`` will transform
          into ``#name``.
  
          This will also transform @everyone and @here mentions into
          non-mentions.
  
          .. note::
  
              This *does not* escape markdown. If you want to escape
              markdown then use :func:`utils.escape_markdown` along
              with this function.