src/pkg: make package doc comments consistently start with "Package foo".
R=rsc
CC=golang-dev
https://golang.org/cl/4442064
diff --git a/src/pkg/big/nat.go b/src/pkg/big/nat.go
index a04d3b1..4848d42 100755
--- a/src/pkg/big/nat.go
+++ b/src/pkg/big/nat.go
@@ -2,11 +2,7 @@
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
-// This file contains operations on unsigned multi-precision integers.
-// These are the building blocks for the operations on signed integers
-// and rationals.
-
-// This package implements multi-precision arithmetic (big numbers).
+// Package big implements multi-precision arithmetic (big numbers).
// The following numeric types are supported:
//
// - Int signed integers
@@ -18,6 +14,10 @@
//
package big
+// This file contains operations on unsigned multi-precision integers.
+// These are the building blocks for the operations on signed integers
+// and rationals.
+
import "rand"
// An unsigned integer x of the form
