exp/template: rename filter: url -> urlquery.

R=r, rsc
CC=golang-dev
https://golang.org/cl/4873046
diff --git a/src/pkg/exp/template/exec_test.go b/src/pkg/exp/template/exec_test.go
index 58e9526..a8ef64d 100644
--- a/src/pkg/exp/template/exec_test.go
+++ b/src/pkg/exp/template/exec_test.go
@@ -313,8 +313,8 @@
 	// JavaScript.
 	{"js", `{{js .}}`, `It\'d be nice.`, `It'd be nice.`, true},
 
-	// URL.
-	{"url", `{{"http://www.example.org/"|url}}`, "http%3A%2F%2Fwww.example.org%2F", nil, true},
+	// URL query.
+	{"urlquery", `{{"http://www.example.org/"|urlquery}}`, "http%3A%2F%2Fwww.example.org%2F", nil, true},
 
 	// Booleans
 	{"not", "{{not true}} {{not false}}", "false true", nil, true},