Bad auto-URL-extraction, presumably. The PDF reads:
> Large language models (LLMs) for code have become indispensable in various domains, including code generation, reasoning tasks and agent systems. While open-access code LLMs are increasingly approaching the performance levels of proprietary models,
arXiv replaces any URL in the text of the abstract with a link with text "this http url"; it seems the authors did not know this and just embedded a bare URL in their abstract.
A more restrictive TLD list would have prevented this, but I certainly don't want to be the one to add new TLDs all the time, so I can see why the code looks like it does.
Is this slob?