Index: src/wp-includes/theme.php
===================================================================
--- src/wp-includes/theme.php	(revision 45154)
+++ src/wp-includes/theme.php	(working copy)
@@ -2327,13 +2327,14 @@
  * @since 5.0.0 The `responsive-embeds`, `align-wide`, `dark-editor-style`, `disable-custom-colors`,
  *              `disable-custom-font-sizes`, `editor-color-pallete`, `editor-font-sizes`,
  *              `editor-styles`, and `wp-block-styles` features were added.
+ * @since 5.2.0 The `body-open` feature was added.
  *
  * @global array $_wp_theme_features
  *
  * @param string $feature  The feature being added. Likely core values include 'post-formats',
  *                         'post-thumbnails', 'html5', 'custom-logo', 'custom-header-uploads',
  *                         'custom-header', 'custom-background', 'title-tag', 'starter-content',
- *                         'responsive-embeds', etc.
+ *                         'responsive-embeds', 'body-open' etc.
  * @param mixed  $args,... Optional extra arguments to pass along with certain features.
  * @return void|bool False on failure, void otherwise.
  */