Block module spelling corrections

+++ b/core/modules/block/block.module
@@ -24,9 +24,9 @@ function block_help($route_name, RouteMatchInterface $route_match) {
-      $output .= '<dd>' . t('You can see which region is where in a theme by clicking an the <em>Demonstrate block regions</em> link on the <a href="!blocks">Block layout page</a>. Regions are specific to each theme, so you need to toggle to a different theme first to demonstrate its block regions.', array('!blocks' => \Drupal::url('block.admin_display'))) . '</dd>';
+      $output .= '<dd>' . t('You can see which region is where in a theme by clicking on the <em>Demonstrate block regions</em> link on the <a href="!blocks">Block layout page</a>. Regions are specific to each theme, so you need to toggle to a different theme first to demonstrate its block regions.', array('!blocks' => \Drupal::url('block.admin_display'))) . '</dd>';

I can't for the life of me see what the change/fix here is. The first change fixes an obvious duplication typo.

This are both valid typo corrections.

This is unfrozen change (strings), and doesn't include any disruptive changes, so it is allowed per https://www.drupal.org/core/beta-changes. Committed c2a7d6c and pushed to 8.0.x. Thanks!