Fix several out of date references to 4g/5g/6g/8g/9g.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/index.go b/test/index.go
index a8c471b..9ff9e9f 100644
--- a/test/index.go
+++ b/test/index.go
@@ -216,7 +216,7 @@
 		thisPass := 0
 		if c == "c" && (a == "a" || a == "pa" || n == "n" || i == "i64big" || i == "i64bigger" || i == "huge" || i == "fbad") {
 			if i == "huge" {
-				// Due to a detail of 6g's internals,
+				// Due to a detail of gc's internals,
 				// the huge constant errors happen in an
 				// earlier pass than the others and inhibits
 				// the next pass from running.