File links are not decoded on restore

[dmitriim]

Seems like define_decode_contents doesn't decode everything correctly.

If you add something like this to your content

<p><img class="img-fluid align-top" role="presentation" src="https://moodle.localhost/pluginfile.php/22/mod_page/content/2/vid-introduction-pic.png" alt="" width="1300" height="550"></p>

On restore you will get something like this:

<img class="img-fluid align-top" role="presentation" src="$@PLUGINFILEBYCONTEXT*22@$/mod_page/content/2/vid-introduction-pic.png" alt="" width="1300" height="550">

[dmitriim]

Seems like it's a core issue. I can replicate it on master for course custom fields. However, potentially this plugin would need to implement decoding when core supports it,