redirector-fix.ex

# Router example:

    get "/", Redirector, external: "http://other-domain/"

# Test case:

  test "route redirected to external route without path/query" do
    conn = call(Router, :get, "/")

    assert_redirected_to(conn, "http://other-domain/")
  end

# Additional code in "redirector.ex" which handles this case:

  defp merge_query_string(%URI{query: nil} = destination_uri, %Plug.Conn{query_string: ""}) do
    destination_uri
  end