* WordPress Diff bastard child of old MediaWiki Diff Formatter.
* Basically all that remains is the table structure and some method names.
if ( ! class_exists( 'Text_Diff', false ) ) {
require ABSPATH . WPINC . '/Text/Diff.php';
/** Text_Diff_Renderer class */
require ABSPATH . WPINC . '/Text/Diff/Renderer.php';
/** Text_Diff_Renderer_inline class */
require ABSPATH . WPINC . '/Text/Diff/Renderer/inline.php';
require ABSPATH . WPINC . '/class-wp-text-diff-renderer-table.php';
require ABSPATH . WPINC . '/class-wp-text-diff-renderer-inline.php';