Pasting a URL over a shortcode attribute shouldn't produce a link

[johnbillion]

Steps to reproduce:

1. Ensure you're on the Visual tab in the post editor.
2. Add the following shortcode to the post content: [foo bar="http://example.com"].
3. Copy a different URL into your clipboard and paste it over the contents of the bar attribute.

Expected behaviour is that the URL gets replaced with the URL from your clipboard.

Actual behaviour is that the value of the bar attribute gets converted into a link anchor, due to the automatic linking functionality in the editor.

Related: #38628.

[lukecavanagh]

@johnbillion

I get this when you view in the text editor, so copied the Google URL and pasted in visual tab of the editor, over the ​http://example.com original URL.

[foo bar="<a href="https://www.google.com/">http://example.com</a>"]

[pento]

In line with #38628, I'm going to close this as maybelater, since the block editor supersedes both the classic editor, and shortcodes.