drupal/core/modules/sqlite/sqlite.module

<?php

/**
 * @file
 * The SQLite module provides the connection between Drupal and a SQLite database.
 */

use Drupal\Core\Routing\RouteMatchInterface;

/**
 * Implements hook_help().
 */
function sqlite_help($route_name, RouteMatchInterface $route_match) {
  switch ($route_name) {
    case 'help.page.sqlite':
      $output = '';
      $output .= '<h3>' . t('About') . '</h3>';
      $output .= '<p>' . t('The SQLite module provides the connection between Drupal and a SQLite database. For more information, see the <a href=":sqlite">online documentation for the SQLite module</a>.', [':sqlite' => 'https://www.drupal.org/docs/core-modules-and-themes/core-modules/sqlite-module']) . '</p>';
      return $output;

  }
}