make test/ken safe for optional semis

R=rsc, ken2, ken3
https://golang.org/cl/174042
diff --git a/test/ken/interbasic.go b/test/ken/interbasic.go
index c6b982f..5199c41 100644
--- a/test/ken/interbasic.go
+++ b/test/ken/interbasic.go
@@ -11,8 +11,7 @@
 type	I0		interface {};
 
 func
-f()
-{
+f() {
 	var ia, ib I0;
 	var i myint;
 	var s mystring;
@@ -52,8 +51,7 @@
 }
 
 func
-main()
-{
+main() {
 	var ia [20]I0;
 	var b bool;
 	var s string;