Editor: disable default style engine optimisation.

Stops style engine from combining CSS selectors by default so that rule order is preserved.

Props ramonopoly, rajinsharwar, timdix, costdev, audrasjb, SergeyBiryukov, JeffPaul, mukesh27.
Fixes #58811.


git-svn-id: https://develop.svn.wordpress.org/trunk@56574 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/style-engine/class-wp-style-engine-processor.php

@@ -85,12 +85,13 @@ class WP_Style_Engine_Processor {
 	 * Gets the CSS rules as a string.
 	 *
 	 * @since 6.1.0
+	 * @since 6.4.0 The Optimization is no longer the default.
 	 *
 	 * @param array $options   {
 	 *     Optional. An array of options. Default empty array.
 	 *
 	 *     @type bool $optimize Whether to optimize the CSS output, e.g. combine rules.
-	 *                          Default true.
+	 *                          Default false.
 	 *     @type bool $prettify Whether to add new lines and indents to output.
 	 *                          Defaults to whether the `SCRIPT_DEBUG` constant is defined.
 	 * }
@@ -98,7 +99,7 @@ class WP_Style_Engine_Processor {
 	 */
 	public function get_css( $options = array() ) {
 		$defaults = array(
-			'optimize' => true,
+			'optimize' => false,
 			'prettify' => defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG,
 		);
 		$options  = wp_parse_args( $options, $defaults );