Issue #3257776: PHP 8.1 EasyBreadcrumbBuilder::normalizeText deprecation

src/EasyBreadcrumbBuilder.php

@@ -876,13 +876,16 @@ class EasyBreadcrumbBuilder implements BreadcrumbBuilderInterface {
    * E.g., transforms "about-us" to "About Us" or "About us", according to
    * parameters.
    *
-   * @param string $raw_text
+   * @param string|null $raw_text
    *   Text to be normalized.
    *
    * @return string
    *   Normalized title.
    */
   private function normalizeText($raw_text) {
+    if (empty($raw_text)) {
+      return '';
+    }
 
     // Transform '-hello--world_javascript-' to 'hello world javascript'.
     $normalized_text = str_replace(['-', '_'], ' ', $raw_text);