diff --git a/src/wp-includes/post.php b/src/wp-includes/post.php
index e3b2eef4d7..c0372ade57 100644
--- a/src/wp-includes/post.php
+++ b/src/wp-includes/post.php
@@ -6223,7 +6223,7 @@ function wp_get_attachment_url( $attachment_id = 0 ) {
  * @since 4.6.0
  *
  * @param int $post_id Optional. Attachment ID. Default is the ID of the global `$post`.
- * @return string|false Attachment caption on success, false on failure. 
+ * @return string|false Attachment caption on success, false on failure.
  */
 function wp_get_attachment_caption( $post_id = 0 ) {
 	$post_id = (int) $post_id;