Make it return "template.URL" to follow Golang template's context auto-escaping. (cherry picked from commit 3e94ac5c7c6751919453fdb66ba3472e2793759e)
Make it return "template.URL" to follow Golang template's context auto-escaping. (cherry picked from commit 3e94ac5c7c6751919453fdb66ba3472e2793759e)