In classic mode, if we write "example.com", it creates automated link like :

 <a class="vglnk" href="http://example.com" rel="nofollow">
     <span>example</span>
     <span>.</span>
     <span>com</span>
 </a>

What I tried:

• I searched about it and found that class="vglnk" comes from Discus Plugin and we need to tick some options to do that. But I do not want to do it because of some basic operations' security.

• I tried to search about HTML entity for 'dot'. so that we can use that sign so that wordpress does not take it as a link. But that sign converts into '.' itself

• I tried to add that link in <!-- wp:html -->example.com<!-- /wp:html -->..it did not work

• I tried to add <pre>example.com</pre> but still it is not working

I want plain text of example.com, please assist me.