replace non-blocking send, receive syntax with select

R=golang-dev, nigeltao, niemeyer, r
CC=golang-dev
https://golang.org/cl/4079053
diff --git a/test/fixedbugs/bug081.go b/test/fixedbugs/bug081.go
index ccb3699..8d3d538 100644
--- a/test/fixedbugs/bug081.go
+++ b/test/fixedbugs/bug081.go
@@ -1,12 +1,12 @@
-// ! $G $D/$F.go
+// errchk $G $D/$F.go
 
 // Copyright 2009 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.
 
-package main	
- 	
-const x x = 2;
+package main
+
+const x x = 2 // ERROR "loop"
 
 /*
 bug081.go:3: first constant must evaluate an expression