diff --git a/core/modules/system/theme.api.php b/core/modules/system/theme.api.php
index 7f7a73f..c86b161 100644
--- a/core/modules/system/theme.api.php
+++ b/core/modules/system/theme.api.php
@@ -14,10 +14,9 @@
  * determine how the information in the array is converted to themed output.
  *
  * To invoke a theme implementation on a renderable array, define a key named
- * '#theme' and assign it a string value that is the name of a
- * theme hook. Any variables that the theme hook requires
- * may be supplied as additional keys -- prepended with a '#' character -- in
- * the renderable array.
+ * '#theme' and assign it a string value that is the name of a theme hook. Any
+ * variables that the theme hook requires may be supplied as additional keys --
+ * prepended with a '#' character -- in the renderable array.
  *
  * @code
  * $item_list = array(