test: commentary for [h-m]*.go

R=golang-dev, gri
CC=golang-dev
https://golang.org/cl/5674112
diff --git a/test/import3.go b/test/import3.go
index e4900b9..274fcfe 100644
--- a/test/import3.go
+++ b/test/import3.go
@@ -4,7 +4,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-// Check that all the types from import2.go made it
+// Test that all the types from import2.go made it
 // intact and with the same meaning, by assigning to or using them.
 
 package main