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/recursive2.go b/test/interface/recursive2.go
index a7f9ab5..5129ceb 100644
--- a/test/interface/recursive2.go
+++ b/test/interface/recursive2.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 the mutually recursive types in recursive1.go made it
+// Test that the mutually recursive types in recursive1.go made it
// intact and with the same meaning, by assigning to or using them.
package main
