Resolve #2774071: Drupal.NamingConventions, Drupal.Semantics.FunctionT, Generic.PHP.UpperCaseConstant

Closes #2774071 Fix

• Drupal.NamingConventions.ValidVariableName.LowerCamelName
• Drupal.Semantics.FunctionT.BackslashSingleQuote
• Generic.PHP.UpperCaseConstant.Found

src/Element/TokenTreeTable.php

@@ -97,7 +97,7 @@ class TokenTreeTable extends Table {
     $element['#attributes']['class'][] = 'token-tree';
 
     if ($element['#click_insert']) {
-      $element['#caption'] = t('Click a token to insert it into the field you\'ve last clicked.');
+      $element['#caption'] = t("Click a token to insert it into the field you've last clicked.");
       $element['#attributes']['class'][] = 'token-click-insert';
     }