added package documentation

R=r, rsc
http://go/go-review/1025023

diff --git a/src/pkg/go/doc/doc.go b/src/pkg/go/doc/doc.go
index d9d436ccbb5a0899aa524a38aaf629e84ff9fddb..865f52ec461e7db325804312bee5615e06b9b580 100644 (file)
--- a/src/pkg/go/doc/doc.go
+++ b/src/pkg/go/doc/doc.go
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// The doc package extracts source code documentation from a Go AST.
 package doc
 
 import (