Coding Standards: Extraneous white space at end of line.

Fixes a minor coding standards issue.

Follow up to [51082].

See #51189.

git-svn-id: https://develop.svn.wordpress.org/trunk@51084 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/comment-template.php

@@ -1647,7 +1647,7 @@ function comments_popup_link( $zero = false, $one = false, $more = false, $css_c
  *
  * @since 2.7.0
  * @since 4.4.0 Added the ability for `$comment` to also accept a WP_Comment object.
- * 
+ *
  * @param array          $args {
  *     Optional. Override default arguments.
  *