diff --git a/core/modules/dynamic_page_cache/dynamic_page_cache.module b/core/modules/dynamic_page_cache/dynamic_page_cache.module
index 64d78f9..dab03ed 100644
--- a/core/modules/dynamic_page_cache/dynamic_page_cache.module
+++ b/core/modules/dynamic_page_cache/dynamic_page_cache.module
@@ -14,7 +14,7 @@ function dynamic_page_cache_help($route_name, RouteMatchInterface $route_match)
   switch ($route_name) {
     case 'help.page.dynamic_page_cache':
       $output = '<h3>' . t('About') . '</h3>';
-      $output .= '<p>' . t('The Dynamic Page Cache module caches pages for all users in the database, handling dynamic content correctly. For more information, see the <a href="!dynamic_page_cache-documentation">online documentation for the Dynamic Page Cache module</a>.', ['!dynamic_page_cache-documentation' => 'https://www.drupal.org/documentation/modules/dynamic_page_cache']) . '</p>';
+      $output .= '<p>' . t('The Dynamic Page Cache module caches pages for all users in the database, handling dynamic content correctly. For more information, see the <a href=":dynamic_page_cache-documentation">online documentation for the Dynamic Page Cache module</a>.', [':dynamic_page_cache-documentation' => 'https://www.drupal.org/documentation/modules/dynamic_page_cache']) . '</p>';
       $output .= '<h3>' . t('Uses') . '</h3>';
       $output .= '<dl>';
       $output .= '<dt>' . t('Speeding up your site') . '</dt>';
diff --git a/core/modules/help/src/Tests/HelpTest.php b/core/modules/help/src/Tests/HelpTest.php
index 3c7db11..65f3b4f 100644
--- a/core/modules/help/src/Tests/HelpTest.php
+++ b/core/modules/help/src/Tests/HelpTest.php
@@ -67,7 +67,7 @@ public function testHelp() {
     // Verify that introductory help text exists, goes for 100% module coverage.
     $this->drupalLogin($this->adminUser);
     $this->drupalGet('admin/help');
-    $this->assertRaw(t('For more information, refer to the subjects listed in the Help Topics section or to the <a href="!docs">online documentation</a> and <a href="!support">support</a> pages at <a href="!drupal">drupal.org</a>.', array('!docs' => 'https://www.drupal.org/documentation', '!support' => 'https://www.drupal.org/support', '!drupal' => 'https://www.drupal.org')), 'Help intro text correctly appears.');
+    $this->assertRaw(t('For more information, refer to the subjects listed in the Help Topics section or to the <a href=":docs">online documentation</a> and <a href=":support">support</a> pages at <a href=":drupal">drupal.org</a>.', array(':docs' => 'https://www.drupal.org/documentation', ':support' => 'https://www.drupal.org/support', ':drupal' => 'https://www.drupal.org')), 'Help intro text correctly appears.');
 
     // Verify that help topics text appears.
     $this->assertRaw('<h2>' . t('Help topics') . '</h2><p>' . t('Help is available on the following items:') . '</p>', 'Help topics text correctly appears.');
diff --git a/core/modules/page_cache/page_cache.module b/core/modules/page_cache/page_cache.module
index 398234b..f9eb955 100644
--- a/core/modules/page_cache/page_cache.module
+++ b/core/modules/page_cache/page_cache.module
@@ -21,7 +21,7 @@ function page_cache_help($route_name, RouteMatchInterface $route_match) {
       $output .= '<dt>' . t('Speeding up your site') . '</dt>';
       $output .= '<dd>' . t('Pages requested by anonymous users are stored the first time they are requested and then are reused. Depending on your site configuration and the amount of your web traffic tied to anonymous visitors, the caching system may significantly increase the speed of your site.') . '</dd>';
       $output .= '<dd>' . t('Pages are usually identical for all anonymous users, while they can be personalized for each authenticated user. This is why entire pages can be cached for anonymous users, whereas they will have to be rebuilt for every authenticated user.') . '</dd>';
-      $output .= '<dd>' . t('To speed up your site for authenticated users, see the <a href="!dynamic_page_cache-help">Dynamic Page Cache module</a>.', ['!dynamic_page_cache-help' => (\Drupal::moduleHandler()->moduleExists('dynamic_page_cache')) ? Url::fromRoute('help.page', ['name' => 'dynamic_page_cache'])->toString()  : '#']) . '</p>';
+      $output .= '<dd>' . t('To speed up your site for authenticated users, see the <a href=":dynamic_page_cache-help">Dynamic Page Cache module</a>.', [':dynamic_page_cache-help' => (\Drupal::moduleHandler()->moduleExists('dynamic_page_cache')) ? Url::fromRoute('help.page', ['name' => 'dynamic_page_cache'])->toString()  : '#']) . '</p>';
       $output .= '<dt>' . t('Configuring the internal page cache') . '</dt>';
       $output .= '<dd>' . t('On the <a href=":cache-settings">Performance page</a>, you can configure how long browsers and proxies may cache pages; that setting is also respected by the Internal Page Cache module. There is no other configuration.', array(':cache-settings' => \Drupal::url('system.performance_settings')))  . '</dd>';
       $output .= '</dl>';
diff --git a/core/modules/responsive_image/src/ResponsiveImageStyleForm.php b/core/modules/responsive_image/src/ResponsiveImageStyleForm.php
index 3badae1..301004e 100644
--- a/core/modules/responsive_image/src/ResponsiveImageStyleForm.php
+++ b/core/modules/responsive_image/src/ResponsiveImageStyleForm.php
@@ -118,7 +118,7 @@ public function form(array $form, FormStateInterface $form_state) {
         );
         $image_style_mapping = $responsive_image_style->getImageStyleMapping($breakpoint_id, $multiplier);
         if (\Drupal::moduleHandler()->moduleExists('help')) {
-          $description = $this->t('See the <a href="!responsive_image_help">Responsive Image help page</a> for information on the sizes attribute.', array('!responsive_image_help' => (\Drupal::url('help.page', array('name' => 'responsive_image')))));
+          $description = $this->t('See the <a href=":responsive_image_help">Responsive Image help page</a> for information on the sizes attribute.', array(':responsive_image_help' => (\Drupal::url('help.page', array('name' => 'responsive_image')))));
         }
         else {
           $description = $this->t('Enable the Help module for more information on the sizes attribute.');
diff --git a/core/modules/system/src/Form/CronForm.php b/core/modules/system/src/Form/CronForm.php
index c57ceae..5f45d6f 100644
--- a/core/modules/system/src/Form/CronForm.php
+++ b/core/modules/system/src/Form/CronForm.php
@@ -107,7 +107,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     );
 
     $form['cron_url'] = array(
-      '#markup' => '<p>' . t('To run cron from outside the site, go to <a href="!cron">!cron</a>', array('!cron' => $this->url('system.cron', array('key' => $this->state->get('system.cron_key')), array('absolute' => TRUE)))) . '</p>',
+      '#markup' => '<p>' . t('To run cron from outside the site, go to <a href=":cron">:cron</a>', array(':cron' => $this->url('system.cron', array('key' => $this->state->get('system.cron_key')), array('absolute' => TRUE)))) . '</p>',
     );
 
     $form['cron'] = array(
diff --git a/core/modules/system/src/Form/PerformanceForm.php b/core/modules/system/src/Form/PerformanceForm.php
index 542d691..4d28ac7 100644
--- a/core/modules/system/src/Form/PerformanceForm.php
+++ b/core/modules/system/src/Form/PerformanceForm.php
@@ -141,7 +141,7 @@ public function buildForm(array $form, FormStateInterface $form_state) {
     $disabled = !$is_writable;
     $disabled_message = '';
     if (!$is_writable) {
-      $disabled_message = ' ' . t('<strong class="error">Set up the <a href="!file-system">public files directory</a> to make these optimizations available.</strong>', array('!file-system' => $this->url('system.file_system_settings')));
+      $disabled_message = ' ' . t('<strong class="error">Set up the <a href=":file-system">public files directory</a> to make these optimizations available.</strong>', array(':file-system' => $this->url('system.file_system_settings')));
     }
 
     $form['bandwidth_optimization'] = array(
diff --git a/core/modules/update/update.module b/core/modules/update/update.module
index e7472a5..d5ed50a 100644
--- a/core/modules/update/update.module
+++ b/core/modules/update/update.module
@@ -96,10 +96,10 @@ function update_help($route_name, RouteMatchInterface $route_match) {
 
     case 'system.modules_list':
       if (_update_manager_access()) {
-        $output = '<p>' . t('Regularly review and install <a href="!updates">available updates</a> to maintain a secure and current site. Always run the <a href="!update-php">update script</a> each time a module is updated.', array('!update-php' => \Drupal::url('system.db_update'), '!updates' => \Drupal::url('update.status'))) . '</p>';
+        $output = '<p>' . t('Regularly review and install <a href=":updates">available updates</a> to maintain a secure and current site. Always run the <a href=":update-php">update script</a> each time a module is updated.', array(':update-php' => \Drupal::url('system.db_update'), ':updates' => \Drupal::url('update.status'))) . '</p>';
       }
       else {
-        $output = '<p>' . t('Regularly review <a href="!updates">available updates</a> to maintain a secure and current site. Always run the <a href="!update-php">update script</a> each time a module is updated.', array('!update-php' => \Drupal::url('system.db_update'), '!updates' => \Drupal::url('update.status'))) . '</p>';
+        $output = '<p>' . t('Regularly review <a href=":updates">available updates</a> to maintain a secure and current site. Always run the <a href=":update-php">update script</a> each time a module is updated.', array(':update-php' => \Drupal::url('system.db_update'), ':updates' => \Drupal::url('update.status'))) . '</p>';
       }
       return $output;
   }