From 8ef9aa825144c7aee7b99022eebd8a9df2a6a25c Mon Sep 17 00:00:00 2001
From: MarkBaker <mark@lange.demon.co.uk>
Date: Mon, 23 May 2022 00:08:06 +0200
Subject: [PATCH] Minor performance tweak

---
 src/PhpSpreadsheet/Worksheet/Validations.php | 7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/src/PhpSpreadsheet/Worksheet/Validations.php b/src/PhpSpreadsheet/Worksheet/Validations.php
index cd76d2a4..0d668d6f 100644
--- a/src/PhpSpreadsheet/Worksheet/Validations.php
+++ b/src/PhpSpreadsheet/Worksheet/Validations.php
@@ -42,10 +42,9 @@ class Validations
     public static function validateCellOrCellRange($cellRange): string
     {
         if (is_string($cellRange) || is_numeric($cellRange)) {
-            // Convert a single column reference like 'A' to 'A:A'
-            $cellRange = (string) preg_replace('/^([A-Z]+)$/', '${1}:${1}', (string) $cellRange);
-            // Convert a single row reference like '1' to '1:1'
-            $cellRange = (string) preg_replace('/^(\d+)$/', '${1}:${1}', $cellRange);
+            // Convert a single column reference like 'A' to 'A:A',
+            //    a single row reference like '1' to '1:1'
+            $cellRange = (string) preg_replace('/^([A-Z]+|\d+)$/', '${1}:${1}', (string) $cellRange);
         } elseif (is_object($cellRange) && $cellRange instanceof CellAddress) {
             $cellRange = new CellRange($cellRange, $cellRange);
         }