From 68002815ec436157e851d863d4968e9b0417f59a Mon Sep 17 00:00:00 2001
From: oleibman <eclipsechasers2@yahoo.com>
Date: Sun, 31 May 2020 10:59:10 -0700
Subject: [PATCH] Update src/PhpSpreadsheet/Writer/Html.php

Co-authored-by: Adrien Crivelli <adrien.crivelli@gmail.com>
---
 src/PhpSpreadsheet/Writer/Html.php | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/PhpSpreadsheet/Writer/Html.php b/src/PhpSpreadsheet/Writer/Html.php
index 2796de50..1403d9be 100644
--- a/src/PhpSpreadsheet/Writer/Html.php
+++ b/src/PhpSpreadsheet/Writer/Html.php
@@ -134,9 +134,9 @@ class Html extends BaseWriter
     /**
      * Callback for editing generated html.
      *
-     * @var callable
+     * @var null|callable
      */
-    protected $editHtmlCallback = '';
+    protected $editHtmlCallback = null;
 
     /**
      * Create a new HTML.