all: don't refer to code.google.com/p/go{,-wiki}/

Only documentation / comment changes. Update references to
point to golang.org permalinks or go.googlesource.com/go.
References in historical release notes under doc are left as is.

Change-Id: Icfc14e4998723e2c2d48f9877a91c5abef6794ea
Reviewed-on: https://go-review.googlesource.com/4060
Reviewed-by: Ian Lance Taylor <iant@golang.org>
diff --git a/test/fixedbugs/bug293.go b/test/fixedbugs/bug293.go
index bf926f5..0190c6a 100644
--- a/test/fixedbugs/bug293.go
+++ b/test/fixedbugs/bug293.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.
 
-// http://code.google.com/p/go/issues/detail?id=846
+// http://golang.org/issue/846
 
 package main