Issue #3466585 by Anybody, Grevil: Use a multidimensional render array to keep the original title and prefix / suffix it

Closes #3466585

modules/taxonomy_term_title_ps/taxonomy_term_title_ps.module

@@ -46,10 +46,16 @@ function taxonomy_term_title_ps_preprocess_page_title(&$variables) {
 
         if ($title_prefix !== '' || $title_suffix !== '') {
           if (is_array($variables['title']) && !empty($variables['title']['#markup'])) {
-            // Taxonomy terms use ['title']['#markup'] for their name:
-            $variables['title']['#markup'] = $title_prefix . $variables['title']['#markup'] . $title_suffix;
+            // Titles can be render arrays:
+            $originalTitle = $variables['title'];
+            // So we keep the array structure and the original contents.
+            $variables['title'] = [];
+            $variables['title'][] = ['#plain_text' => $title_prefix];
+            $variables['title'][] = $originalTitle;
+            $variables['title'][] = ['#plain_text' => $title_suffix];
           }
           else {
+            // Or titles can be strings:
             $variables['title'] = taxonomy_term_title_ps_generate($title_prefix, $variables['title'], $title_suffix);
           }
         }