Extra spaces in search block / button markup

[bgardner]

Description

Presumably with the addition of #40260, an extra space is added before the wp-element-button class on buttons found in the search block:

Step-by-step reproduction instructions

1. Go to front end of website
2. Inspect search form button
3. See below

Screenshots, screen recording, code snippet

Environment info

WordPress 6.0, Gutenberg 13.4

Please confirm that you have searched existing issues in the repo.

Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

Yes

[bgardner]

Noting that in the screenshot above, there are other instances of spaces after class names as well.

[skorasaurus]

I think the cause of the extra space is from

gutenberg/packages/block-library/src/search/index.php

Line 105 in 5bc74fa

$button_classes .= ' ' . WP_Theme_JSON_GUTENBERG::__EXPERIMENTAL_ELEMENT_BUTTON_CLASS_NAME;

made by @scruffian ; maybe he has an idea whether it was intentionally included or if it's an accident.

[scruffian]

This was an accident. Feel free to raise a PR to remove it!

[scruffian]

There's a fix here: #41746