Issue #3062638 by alonaoneill, apaderno, Willtg, krina.addweb, fago: Add hook_help()

<?php

/**

 * @file

 * Hook implementations for the Request Info module.

 */

use Drupal\Core\Routing\RouteMatchInterface;

/**

 * Implements hook_help().

 */

function request_info_help($route_name, RouteMatchInterface $arg) {

  switch ($route_name) {

    case 'help.page.request_info':

      $output = '';

      $output .= '<h3>' . t('About') . '</h3>';

      $output .= '<p>' . t('This is a tiny helper module to add request information to the status report. This is helpful to verify Drupal is correctly configured, for example trusted reverse proxy addresses are added or HTTP headers are followed.') . '</p>';

      $output .= '<p>';

      $output .= t('Visit the <a href=":project_link">Request Info</a> project page for more information.', [

        ':project_link' => 'https://www.drupal.org/project/request_info',

      ]);

      $output .= '</p>';

      return $output;

  }

}