"Ah, well that's embarrassing, ..."

No need to be embarrassed. It's just a couple of dud links, which you immediately fixed. We all make mistakes: this is a good thing as we can learn from them. Some years ago, I peppered a page with links like [http://perldoc.perl.org/functions/splice.html|split]: I'm sure everyone has a not too dissimilar yarn they could spin.

Besides, as I used small [Aside: ...] blocks, I imagine few people will pay much attention.  :-)

"... I obviously didn't check my links."

The best time is when you're [preview]‍ing. You can [preview] as often as you want. As it only takes a second or two (YMMV), I typically hit [preview] after most edits: this checks the modifications are as wanted and nothing else is broken.

Tip: Open test links in a new tab/window/panel/whatever: this prevents any issues with the tests, interfering with the preview page.

"Thank you for pointing them out and for the node ID tip, ..."

You're welcome.

"... I believe I have them fixed now."

Thanks for that.

"My comment was meant in jest, ..."

Indubitably.  :-)

"... I agree with your assessment of "infrequent"."

Thanks.