test/interface: document tests
Most already had comments (yay); adjusted for consistency.
R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/5676102
diff --git a/test/interface/embed2.go b/test/interface/embed2.go
index bac2143..1636db78 100644
--- a/test/interface/embed2.go
+++ b/test/interface/embed2.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 methods derived from embedded interface and *interface values.
+// Test methods derived from embedded interface and *interface values.
package main
