fix "declared and not used" in tests;
also template/template.go, missed last time.

R=r
DELTA=116  (61 added, 10 deleted, 45 changed)
OCL=34620
CL=34622
diff --git a/test/fixedbugs/bug087.go b/test/fixedbugs/bug087.go
index 6b5e565..4af8d97 100644
--- a/test/fixedbugs/bug087.go
+++ b/test/fixedbugs/bug087.go
@@ -10,6 +10,7 @@
 
 func main() {
 	i := len(s);  // should be legal to take len() of a constant
+	_ = i;
 }
 
 /*