Default privacy policy page not using latest block markup

[254volkan]

There is some info being logged in the console
I was editing the generated privacy policy page wp-admin/post.php?post=5&action=edit.
This has not been replicated when creating a page and trying to edit it.

[skorasaurus]

Thanks for reporting.

This behavior is intentional and does not mean that anything is broken.

What the message means is that a block's markup has been updated in the post.

When a post or page is saved in WP, the block and its markup is saved.

Over time, a block's markup ​https://developer.wordpress.org/block-editor/getting-started/fundamentals/markup-representation-block/ may change because bugs are fixed or new features are added in WordPress.

When a page or post is opened in the editor, WP will detect that the old markup is being used and will updated the markup to the new markup automatically and the message appears that the markup was updated.

Since a newly created page automatically uses the latest markup for each block, there is no block markup to be updated; thus no message is displayed.

[swissspidy]

Actually, the Privacy Policy page is a new page, and it doesn't currently use the latest markup.

So the page's content needs to be updated in \WP_Privacy_Policy_Content::get_default_content().

The logged message is:

New content generated by `save` function:

<h2 class="wp-block-heading">Where your data is sent</h2>

Content retrieved from post body:

<h2>Where your data is sent</h2>

So we'll have to turn all the <h2> in that method to <h2 class="wp-block-heading">

[swissspidy]

In 57741:

Privacy: Update default privacy page content to use latest block markup.

Avoids “Updated Block” warnings being logged to the console.

Props 254volkan, swissspidy.
Fixes #60530.