Merge branch 'master' into Column-Autofit-Indentation

phpstan-baseline.neon

@@ -4197,7 +4197,7 @@ parameters:
 
 		-
 			message: "#^Strict comparison using \\=\\=\\= between string and null will always evaluate to false\\.$#"
-			count: 1
+			count: 2
 			path: src/PhpSpreadsheet/Worksheet/Worksheet.php
 
 		-

src/PhpSpreadsheet/Worksheet/Worksheet.php

@@ -3014,6 +3014,10 @@ class Worksheet implements IComparable
      */
     public static function extractSheetTitle(string $range, $returnRange = false)
     {
+        if ($range === null) {
+            return $returnRange ? [null, null] : null;
+        }
+
         // Sheet title included?
         if (($sep = strrpos($range, '!')) === false) {
             return $returnRange ? ['', $range] : '';