diff -u b/core/includes/common.inc b/core/includes/common.inc
--- b/core/includes/common.inc
+++ b/core/includes/common.inc
@@ -947,11 +947,11 @@
  * it is marked with a #printed flag and the rendered children of
  * the element are cached. Subsequent calls to render() or
  * \Drupal::service('renderer')->render() will not traverse the
- * child tree of this element
- * again: they will just use the cached children. So if you want to hide an
- * element, be sure to call hide() on the element before its parent tree is
- * rendered for the first time, as it will have no effect on subsequent
- * renderings of the parent tree.
+ * child tree of this element again: they will just use the cached
+ * children. So if you want to hide an element, be sure to call hide()
+ * on the element before its parent tree is rendered for the first
+ * time, as it will have no effect on subsequent renderings of the
+ * parent tree.
  *
  * @param $element
  *   The element to be hidden.
diff -u b/core/lib/Drupal/Core/Entity/entity.api.php b/core/lib/Drupal/Core/Entity/entity.api.php
--- b/core/lib/Drupal/Core/Entity/entity.api.php
+++ b/core/lib/Drupal/Core/Entity/entity.api.php
@@ -1487,7 +1487,7 @@
 
 /**
  * Alter entity renderable values before cache checking in
- *\Drupal::service('renderer')->render().
+ * \Drupal::service('renderer')->render().
  *
  * The values in the #cache key of the renderable array are used to determine if
  * a cache entry exists for the entity's rendered output. Ideally only values
diff -u b/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php b/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php
--- b/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php
+++ b/core/lib/Drupal/Core/EventSubscriber/EarlyRenderingControllerWrapperSubscriber.php
@@ -18,10 +18,10 @@
  * Subscriber that wraps controllers, to handle early rendering.
  *
  * When controllers call \Drupal::service('renderer')->render()
- * (RendererInterface::render()) outside
- * of a render context, we call that "early rendering". Controllers should
- * return only render arrays, but we cannot prevent controllers from doing early
- * rendering. The problem with early rendering is that the bubbleable metadata
+ * (RendererInterface::render()) outside of a render context, we call
+ * that "early rendering". Controllers should return only render
+ * arrays, but we cannot prevent controllers from doing early rendering.
+ * The problem with early rendering is that the bubbleable metadata
  * (cacheability & attachments) are lost.
  *
  * This can lead to broken pages (missing assets), stale pages (missing cache
diff -u b/core/lib/Drupal/Core/Form/FormBuilderInterface.php b/core/lib/Drupal/Core/Form/FormBuilderInterface.php
--- b/core/lib/Drupal/Core/Form/FormBuilderInterface.php
+++ b/core/lib/Drupal/Core/Form/FormBuilderInterface.php
@@ -246,9 +246,9 @@
    * two are self::doValidateForm() (invoked via self::validateForm() and used
    * to invoke validation logic for each element) and
    * \Drupal::service('renderer')->render() (for rendering each element).
-   * Each of these three pipelines provides ample
-   * opportunity for modules to customize what happens. For example, during this
-   * function's life cycle, the following functions get called for each element:
+   * Each of these three pipelines provides ample opportunity for modules to
+   * customize what happens. For example, during this function's life cycle,
+   * the following functions get called for each element:
    * - $element['#value_callback']: A callable that implements how user input is
    *   mapped to an element's #value property. This defaults to a function named
    *   'form_type_TYPE_value' where TYPE is $element['#type'].
diff -u b/core/modules/block/block.api.php b/core/modules/block/block.api.php
--- b/core/modules/block/block.api.php
+++ b/core/modules/block/block.api.php
@@ -73,8 +73,8 @@
  * the structured content array, it may use this hook to add a #post_render
  * callback. Alternatively, it could also implement hook_preprocess_HOOK() for
  * block.html.twig. See \Drupal::service('renderer')->render()
- * documentation or the
- * @link themeable Default theme implementations topic @endlink for details.
+ * documentation or the @link themeable Default theme implementations topic
+ * @endlink for details.
  *
  * In addition to hook_block_view_alter(), which is called for all blocks, there
  * is hook_block_view_BASE_BLOCK_ID_alter(), which can be used to target a
diff -u b/core/modules/image/src/Tests/ImageDimensionsTest.php b/core/modules/image/src/Tests/ImageDimensionsTest.php
--- b/core/modules/image/src/Tests/ImageDimensionsTest.php
+++ b/core/modules/image/src/Tests/ImageDimensionsTest.php
@@ -278,12 +278,10 @@
    * Render an image style element.
    *
    * \Drupal::service('renderer')->render() alters the passed $variables array
-   * by adding a new key
-   * '#printed' => TRUE. This prevents next call to re-render the element. We
-   * wrap \Drupal::service('renderer')->render() in a helper protected method
-   * and pass each time a
-   * fresh array so that $variables won't get altered and the element is
-   * re-rendered each time.
+   * by adding a new key '#printed' => TRUE. This prevents next call to re-render
+   * the element. We wrap \Drupal::service('renderer')->render() in a helper
+   * protected method and pass each time a fresh array so that $variables won't
+   * get altered and the element is re-rendered each time.
    */
   protected function getImageTag($variables) {
     return str_replace("\n", NULL, \Drupal::service('renderer')->renderRoot($variables));
diff -u b/core/modules/simpletest/src/WebTestBase.php b/core/modules/simpletest/src/WebTestBase.php
--- b/core/modules/simpletest/src/WebTestBase.php
+++ b/core/modules/simpletest/src/WebTestBase.php
@@ -215,9 +215,9 @@
    * Entities postpone the composition of their renderable arrays to #pre_render
    * functions in order to maximize cache efficacy. This means that the full
    * renderable array for an entity is constructed in
-   * \Drupal::service('renderer')->render(). Some
-   * tests require the complete renderable array for an entity outside of the
-   * drupal_render process in order to verify the presence of specific values.
+   * \Drupal::service('renderer')->render(). Some tests require the complete
+   * renderable array for an entity outside of the drupal_render process in
+   * order to verify the presence of specific values.
    * This method isolates the steps in the render process that produce an
    * entity's renderable array.
    *
diff -u b/core/themes/seven/seven.theme b/core/themes/seven/seven.theme
--- b/core/themes/seven/seven.theme
+++ b/core/themes/seven/seven.theme
@@ -27,8 +27,7 @@
  *
  * Use preprocess hook to set #attached to child elements
  * because they will be processed by Twig and
- * \Drupal::service('renderer')->render will
- * be invoked.
+ * \Drupal::service('renderer')->render will be invoked.
  */
 function seven_preprocess_menu_local_tasks(&$variables) {
   if (!empty($variables['primary'])) {