Fixed phpcs issues

Closes #2915427

src/Plugin/Field/FieldFormatter/ExpressionDecimalFormatter.php

@@ -18,4 +18,5 @@ use Drupal\Core\Field\Plugin\Field\FieldFormatter\DecimalFormatter;
  */
 class ExpressionDecimalFormatter extends DecimalFormatter {
   use ExpressionFormatterTrait;
+
 }