updated core to 8.6.1 via composer

core/modules/locale/src/Form/ExportForm.php

@@ -180,7 +180,7 @@ class ExportForm extends FormBase {
       $form_state->setResponse($response);
     }
     else {
-      drupal_set_message($this->t('Nothing to export.'));
+      $this->messenger()->addStatus($this->t('Nothing to export.'));
     }
   }
 

core/modules/locale/src/Form/ImportForm.php

@@ -46,6 +46,7 @@ class ImportForm extends FormBase {
       $container->get('language_manager')
     );
   }
+
   /**
    * Constructs a form for language import.
    *
@@ -175,7 +176,7 @@ class ImportForm extends FormBase {
     if (empty($language)) {
       $language = ConfigurableLanguage::createFromLangcode($form_state->getValue('langcode'));
       $language->save();
-      drupal_set_message($this->t('The language %language has been created.', ['%language' => $this->t($language->label())]));
+      $this->messenger()->addStatus($this->t('The language %language has been created.', ['%language' => $this->t($language->label())]));
     }
     $options = array_merge(_locale_translation_default_update_options(), [
       'langcode' => $form_state->getValue('langcode'),

core/modules/locale/src/Form/TranslateEditForm.php

@@ -219,7 +219,7 @@ class TranslateEditForm extends TranslateFormBase {
       }
     }
 
-    drupal_set_message($this->t('The strings have been saved.'));
+    $this->messenger()->addStatus($this->t('The strings have been saved.'));
 
     // Keep the user on the current pager page.
     $page = $this->getRequest()->query->get('page');

core/modules/locale/src/LocaleConfigManager.php

@@ -43,7 +43,7 @@ class LocaleConfigManager {
   /**
    * The string storage for reading and writing translations.
    *
-   * @var \Drupal\locale\StringStorageInterface;
+   * @var \Drupal\locale\StringStorageInterface
    */
   protected $localeStorage;
 

core/modules/locale/src/PoDatabaseWriter.php

@@ -16,7 +16,7 @@ class PoDatabaseWriter implements PoWriterInterface {
    * An associative array indicating what data should be overwritten, if any.
    *
    * Elements of the array:
-   * - override_options
+   * - overwrite_options
    *   - not_customized: boolean indicating that not customized strings should
    *     be overwritten.
    *   - customized: boolean indicating that customized strings should be
@@ -109,6 +109,16 @@ class PoDatabaseWriter implements PoWriterInterface {
 
   /**
    * Set the options for the current writer.
+   *
+   * @param array $options
+   *   An associative array containing:
+   *   - overwrite_options: An array of options. Each option contains:
+   *     - not_customized: Boolean indicating that not customized strings should
+   *       be overwritten.
+   *     - customized: Boolean indicating that customized strings should be
+   *       overwritten.
+   *   - customized: The strings being imported should be saved as customized.
+   *     One of LOCALE_CUSTOMIZED or LOCALE_NOT_CUSTOMIZED.
    */
   public function setOptions(array $options) {
     if (!isset($options['overwrite_options'])) {

core/modules/locale/src/SourceString.php

@@ -10,6 +10,7 @@ namespace Drupal\locale;
  * value, and is assumed to be in English language.
  */
 class SourceString extends StringBase {
+
   /**
    * {@inheritdoc}
    */