Aztec could change the content of a block even if no changes are actually made to it, and a new History point is added to the Stack

[daniloercoli]

Aztec may slightly change the HTML content passed in input (see HTML tags) and may produce a different version of the HTML code when passed back to JS, resulting in a new History point made in the store.

Original Content
<em>Gutenberg is available as a plugin today, and will be included in version 5.0 of WordPress. The <a href="https://wordpress.org/plugins/classic-editor/">classic editor</a> will be available as a plugin if needed.</em>

Modified content returned to JS
'<em>Gutenberg is available as a plugin today, and will be included in version 5.0 of WordPress. The <a href="https://wordpress.org/plugins/classic-editor/">classic editor</a></em><em> will be available as a plugin if needed.</em>',

The new history point will affect the writing flow, since the user needs to tap twice on the undo button to restore the original state, and go back to a clean history.
It's not a big problem, since those 2 HTML documents, are semantically equals, but the Undo button enabled/available makes the user think that there are changes still need to be undone.

It was originally reported in this PR here: #892 (see the end of the description), and in this comment here: #892 (comment)

Steps to repro:

• Start the demo app
• Tap on a RichText block that does contain styled text
• Tap on enter
• A new para block is created
• You need to tap Undo twice to restore to a clean History