Fix several out of date references to 4g/5g/6g/8g/9g.

Change-Id: Ifb8e4e13c7778a7c0113190051415e096f5db94f
Reviewed-on: https://go-review.googlesource.com/11390
Reviewed-by: Josh Bleecher Snyder <josharian@gmail.com>
Reviewed-by: Andrew Gerrand <adg@golang.org>
diff --git a/test/func6.go b/test/func6.go
index 456cb49..d1b7f46 100644
--- a/test/func6.go
+++ b/test/func6.go
@@ -9,7 +9,7 @@
 package main
 
 func main() {
-	if func() bool { return true }() {}  // 6g used to say this was a syntax error
+	if func() bool { return true }() {}  // gc used to say this was a syntax error
 	if (func() bool { return true })() {}
 	if (func() bool { return true }()) {}
 }