From c5fe904864a2a0943fb447661fba831b85b5467c Mon Sep 17 00:00:00 2001
From: Dave Cheney <dave@cheney.net>
Date: Sat, 11 Jun 2016 15:54:49 +1000
Subject: [PATCH] update godoc

---
 errors.go | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/errors.go b/errors.go
index a31ca30..58996ba 100644
--- a/errors.go
+++ b/errors.go
@@ -51,6 +51,18 @@
 //     type Stacktrace interface {
 //             Stacktrace() []Frame
 //     }
+//
+// The Frame type represents a call site in the stacktrace. Frame supports
+// the fmt.Formatter interface that can be used for printing information about
+// the stacktrace of this error. For example:
+//
+//     if err, ok := err.(Stacktrace); ok {
+//             for _, f := range err.Stacktrace() {
+//                     fmt.Printf("%+s:%d", f)
+//             }
+//     }
+//
+// See the documentation for Frame.Format for more details.
 package errors
 
 import (