Issue #1790612 by carwin: Do not concatenate variables into translatable strings.

core/modules/field/modules/text/text.module

@@ -244,7 +244,9 @@ function text_field_formatter_settings_summary($field, $instance, $view_mode) {
   $summary = '';
 
   if (strpos($display['type'], '_trimmed') !== FALSE) {
-    $summary = t('Trim length') . ': ' . $settings['trim_length'];
+    $summary = t('Trim length: @trim_length', array(
+      '@trim_length' => $settings['trim_length'],
+    ));
   }
 
   return $summary;