PHP 8.1 trim(): Passing null to parameter #1 ($string) of type string is deprecated

Problem/Motivation

The module assumes all content has titles have a length and can be trim()

Deprecated function: trim(): Passing null to parameter #1 ($string) of type string is deprecated in Drupal\suggest_similar_titles\Controller\SuggestionController->suggest_similar_titles_ajax_title() (line 93 of modules/contrib/suggest_similar_titles/src/Controller/SuggestionController.php).

Steps to reproduce

When using Routes List module at /admin/reports/routes-list

Proposed resolution

Simply set a default for title before trim()

Remaining tasks

User interface changes

API changes

Data model changes