def top(count = 3)
      authors = ActorCollection.new
      sort_by { |author| -author.authored_commits.size }.each do |author|
        authors << author
        break if authors.size == count
      end
      authors
    end
def top(count = 3)
      authors = ActorCollection.new
      sort_by { |author| -author.authored_commits.size }.each do |author|
        authors << author
        break if authors.size == count
      end
      authors
    end
Returns up to the given number of actors in this collection with the
 most commits

 @param [Numeric] count The number of actors to return
 @return [ActorCollection] The given number of actors ordered by commit
         count
 @see Actor#commits