The forum program automatically incorporated the trailing period into the link. It take all the text until the next space as part of the link. Since the second URL in my reply was at the end of a sentence, I put a period after it. The other URL did not come at the end of the sentence so I had not typed a period after it, and it was fine.

I did test it in the Preview Post, and that's the way it works. So don't put a period or comma at the end of a URL even if it is grammmatically correct. You learn something new every day!