From a168e9abc9de0fb0aa5d1807f20de5bae21a2d2f Mon Sep 17 00:00:00 2001
From: Erdem Ozgen <m.erdemozgen@gmail.com>
Date: Mon, 1 Aug 2022 01:47:14 +0300
Subject: [PATCH] add line numbers for playpen fixes #1593

---
 book.toml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/book.toml b/book.toml
index 19db456b6d..61fb4057ff 100644
--- a/book.toml
+++ b/book.toml
@@ -6,6 +6,7 @@ author = "The Rust Community"
 [output.html.playpen]
 editable = true
 editor = "ace"
+line-numbers = true
 
 [output.html.fold]
 enable = true