Merge branch '3334297-add-hook-help' into '3.x'

Resolve #3334297 "Add hook help"

See merge request project/twig_tweak!18

twig_tweak.module

@@ -0,0 +1,25 @@
+<?php
+
+/**
+ * @file
+ * Primary module hooks for Twig Tweak module.
+ */
+
+use Drupal\Core\Routing\RouteMatchInterface;
+use Drupal\Core\StringTranslation\TranslatableMarkup;
+
+/**
+ * Implements hook_help().
+ */
+function twig_tweak_help($route_name, RouteMatchInterface $route_match) {
+  if ($route_name == 'help.page.twig_tweak') {
+    $output = '';
+    $output .= '<h3>' . (string) new TranslatableMarkup('About') . '</h3>';
+    $output .= '<p>' . (string) new TranslatableMarkup('Twig Tweak is a small module which provides a Twig extension with some useful functions and filters that can improve development experience.') . '</p>';
+    $output .= '<p>' . (string) new TranslatableMarkup('You can click on the links below for more information about this module.') . '</p>';
+    $output .= '<p>' . (string) new TranslatableMarkup('<a href=":project_link">Project page</a>', [
+      ':project_link' => 'https://www.drupal.org/project/twig_tweak',
+    ]) . '</p>';
+    return $output;
+  }
+}