Issue #3334393: hook_help function missing in .module file

waypoints.module

@@ -4,7 +4,26 @@
  * @file
  * Main file for Waypoints module.
  */
+use Drupal\Core\Routing\RouteMatchInterface;
 
+/**
+ * Implements hook_help().
+ */
+function waypoints_help($route_name, RouteMatchInterface $route_match) {
+  switch ($route_name) {
+    // Main module help for the waypoints module.
+    case 'help.page.waypoints':
+      $output = '';
+      $output .= '<h3>' . t('About') . '</h3>';
+      $output .= '<p>' . t('Waypoints is a small jQuery plugin that makes it easy to execute a function
+      whenever you scroll to an element.
+      Waypoints makes a solid base for modern UI patterns that depend on a user’s
+      scroll position on the page') . '</p>';
+      return $output;
+
+    default:
+  }
+}
 /**
  * Implements hook_page_attachments().
  */