analysis/appengine/template: fix query string
analysis/appengine/template: fix query string

Change-Id: I08e93f469558ca3db356cb03eba345bfe29e36f8
Reviewed-on: https://go-review.googlesource.com/36252
Reviewed-by: Russ Cox <5ad239cb8a44f659eaaee0aa1ea5b94947abe557@golang.org>

golang/perf,golang/perf