Reference to new feature:
Added Edit > Paste with Source Link to include the URL or item link of the source text, if available. This command applies to plain and rich text as well as Markdown documents.
Navigated to the URL / page (MPU forums). Then, I copied the text and pasted it into a newly created RTF document. I expected the complete URL to be copied, but that was not the case. I tried this with another site (theverge.com) and it copied the entire URL.
Also, tried with this forum (discourse.devontechnologies.com), and it seems that on discourse forums, full links are not being copied. (Granted, my testing is very limited to two types of sites )
Test 1 - MPU Forums
Test 2 - The Verge