Issue #2349469 by csakiistvan: Remove dot behind the hint on cmi export page.

core/modules/config/src/Form/ConfigSingleExportForm.php

@@ -155,7 +155,7 @@ public function updateExport($form, FormStateInterface $form_state) {
     }
     // Read the raw data for this config name, encode it, and display it.
     $form['export']['#value'] = Yaml::encode($this->configStorage->read($name));
-    $form['export']['#description'] = $this->t('The filename is %name.', array('%name' => $name . '.yml'));
+    $form['export']['#description'] = $this->t('Filename: %name', array('%name' => $name . '.yml'));
     return $form['export'];
   }