diff --git a/core/modules/system/system.api.php b/core/modules/system/system.api.php
index a72cc3f..10d0d7c 100644
--- a/core/modules/system/system.api.php
+++ b/core/modules/system/system.api.php
@@ -1192,7 +1192,7 @@ function hook_template_preprocess_default_variables_alter(&$variables) {
 }
 
 /**
- * Declares a template file extension to be used with a theme engine.
+ * Declare a template file extension to be used with a theme engine.
  *
  * This hook is used in a theme engine implementation in the format of
  * ENGINE_extension().
@@ -1206,20 +1206,15 @@ function hook_extension() {
 }
 
 /**
- * Renders a template using the theme engine.
- *
- * This hook is used in a theme engine implementation in the format of
- * ENGINE_render_template(). It gets passed a template name and an array of
- * variables and returns a string containing the rendered template.
+ * Render a template using the theme engine.
  *
  * @param string $template_file
- *   The relative path to the template to be rendered including its extension in
- *   the format 'path/to/TEMPLATE_NAME.EXT'. The path should be relative to the
- *   Drupal root directory.
+ *   The path (relative to the Drupal root directory) to the template to be
+ *   rendered including its extension in the format 'path/to/TEMPLATE_NAME.EXT'.
  * @param array $variables
  *   A keyed array of variables that are available for composing the output. The
  *   theme engine is responsible for passing all the variables to the template.
- *   Depending on the code in the template, all or just a subset of those
+ *   Depending on the code in the template, all or just a subset of the
  *   variables might be used in the template.
  *
  * @return string