Issue #2710279 by imrancluster: Need full stop (.) for description field's...

Issue #2710279 by imrancluster: Need full stop (.) for description field's help text for Add Scale effect in Image Styles section

core/modules/image/src/Plugin/ImageEffect/ScaleImageEffect.php

@@ -70,7 +70,7 @@ public function buildConfigurationForm(array $form, FormStateInterface $form_sta
       '#type' => 'checkbox',
       '#default_value' => $this->configuration['upscale'],
       '#title' => t('Allow Upscaling'),
-      '#description' => t('Let scale make images larger than their original size'),
+      '#description' => t('Let scale make images larger than their original size.'),
     );
     return $form;
   }