code: def top_submissions(self):
          
          num = min(10, len(self.submissions))
          if num <= 0:
              return ''
  
          top_submissions = sorted(
              [x for x in self.submissions.values() if self.distinguished or
               x.distinguished is None],
              key=lambda x: (-x.score, -x.num_comments, x.title))[:num]
  
          if not top_submissions:
              return ''
  
          retval = self.post_header.format('Top Submissions')
          for sub in top_submissions:
              title = self._safe_title(sub)
              if sub.permalink in sub.url:
                  retval += tt('1. {}').format(title)
              else:
                  retval += tt('1. [{}]({})').format(title, sub.url)
  
              retval += ' by {} ({}, [{} comment{}]({}))\n'.format(
                  self._user(sub.author), self._points(sub.score),
                  sub.num_comments, 's' if sub.num_comments != 1 else '',
                  self._permalink(sub))
          return tt('{}\n').format(retval)
docs: Return a markdown representation of the top submissions.