math/big: document Word type

R=golang-dev, rsc
CC=golang-dev
https://golang.org/cl/5615050

diff --git a/src/pkg/math/big/arith.go b/src/pkg/math/big/arith.go
index 5a30d3cf3a71e249f6fc210d2fbb6cf0d9526063..f316806d7cae7d8fb52154efe50ba681cdc1e2f6 100644 (file)
--- a/src/pkg/math/big/arith.go
+++ b/src/pkg/math/big/arith.go
@@ -8,8 +8,7 @@
 
 package big
 
-// TODO(gri) Decide if Word needs to remain exported.
-
+// A Word represents a single digit of a multi-precision unsigned integer.
 type Word uintptr
 
 const (