Actually, the link is just fine; it appears that you have discovered a bug in HN's URL matching algorithm. < and > are explicitly recommended by the URI RFC [1]

Actually, the link is just fine; it appears that you have discovered a bug in HN's URL matching algorithm. < and > are explicitly recommended by the URI RFC [1] as delimiters for URLs. [1] https://tools.ietf.org/html/rfc3986#appendix-C https://tools.ietf.org/html/rfc3986#appendix-C