From 8d53b25485793ea94aad5e62773ad5bf477a5af6 Mon Sep 17 00:00:00 2001
From: Krzysztof Kowalczyk <kkowalczyk@gmail.com>
Date: Thu, 28 Mar 2024 16:47:14 +0000
Subject: [PATCH] make NormalizeNewlines() return a copy (fixes #305)

---
 parser/parser.go | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/parser/parser.go b/parser/parser.go
index bd9e515..57f5d1d 100644
--- a/parser/parser.go
+++ b/parser/parser.go
@@ -907,6 +907,9 @@ func isListItem(d ast.Node) bool {
 }
 
 func NormalizeNewlines(d []byte) []byte {
+	res := make([]byte, 0, len(d))
+	copy(res, d)
+	d = res
 	wi := 0
 	n := len(d)
 	for i := 0; i < n; i++ {