test: commentary for [h-m]*.go
R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/5674112
diff --git a/test/label1.go b/test/label1.go
index 8a192c2..f923a18 100644
--- a/test/label1.go
+++ b/test/label1.go
@@ -4,7 +4,10 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
-// Pass 2 label errors.
+
+// Verify that erroneous labels are caught by the compiler.
+// This set is caught by pass 2. That's why this file is label1.go.
+// Does not compile.
package main
