From 06510446d4b4bb79cb38aae61698683795cd4be6 Mon Sep 17 00:00:00 2001
From: Dominique FOURNIER <dominique.fournier@grenoble.cnrs.fr>
Date: Wed, 8 Feb 2023 14:37:48 +0100
Subject: [PATCH] Xdiff : PHP8.2 Deprecated : trim must not receive a null
 parameter

---
 src/Xdiff.php | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/Xdiff.php b/src/Xdiff.php
index efc4f03..6825391 100644
--- a/src/Xdiff.php
+++ b/src/Xdiff.php
@@ -467,7 +467,7 @@ class Xdiff
         if (! is_string($side2)) {
             throw new \Exception("XDiff : side2 parameter not a string");
         }
-        if (trim($symbol) === "") {
+        if ($symbol !== null && trim($symbol) === "") {
             $symbol = null;
         }
         $side1 = mb_substr(rtrim($side1), 0, $this->s2sWidth - 1);