class Test::Unit::Assertions::AssertionMessage::HashInspector

def pretty_print(q)
  q.group(1, '{', '}') do
    q.seplist(self, nil, :each_pair) do |k, v|
      q.group do
        q.pp(k)
        q.text('=>')
        q.group(1) do
          q.breakable('')
          q.pp(v)
        end
      end
    end
  end
end