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/script-loader.php

@@ -3053,7 +3053,7 @@ function wp_enqueue_block_support_styles( $style, $priority = 10 ) {
  *     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.
  *                          Default to whether the `SCRIPT_DEBUG` constant is defined.
  * }