test: explanatory comments [c-g]*

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5656103
diff --git a/test/func6.go b/test/func6.go
index 39c1532..456cb49 100644
--- a/test/func6.go
+++ b/test/func6.go
@@ -1,9 +1,11 @@
-// compile
+// run
 
 // Copyright 2011 The Go Authors.  All rights reserved.
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// Test closures in if conditions.
+
 package main
 
 func main() {