diff --git a/core/lib/Drupal/Core/Render/theme.api.php b/core/lib/Drupal/Core/Render/theme.api.php
index 61cafc3..519429f 100644
--- a/core/lib/Drupal/Core/Render/theme.api.php
+++ b/core/lib/Drupal/Core/Render/theme.api.php
@@ -277,11 +277,11 @@
  *   can customize the markup. Note that the value is passed through
  *   \Drupal\Component\Utility\Xss::filterAdmin(), which strips known XSS
  *   vectors while allowing a permissive list of HTML tags that are not XSS
- *   vectors. (I.e, <script> and <style> are not allowed.) See
+ *   vectors. (For example <script> and <style> are not allowed.) See
  *   \Drupal\Component\Utility\Xss::$adminTags for the list of tags that will
  *   be allowed. If your markup needs any of the tags that are not in this
  *   whitelist, then you can implement a theme hook and template file and/or
- *   an asset library. Aternatively, you can use the render array key
+ *   an asset library. Alternatively, you can use the render array key
  *   #allowed_tags to alter which tags are filtered.
  * - #plain_text: Specifies that the array provides text that needs to be
  *   escaped. This value takes precedence over #markup if present.