What did you think?
If the lingering typo in the first markup example is keeping you up at night, you might be a proofreader! See it corrected in the final markup example at the end of the video.
Did you know that there’s always at least one lingering error? It’s an editorial truism: there’s always one. Also, missing one error out of 28 on this page would represent a 97% error detection rate. That’s exceptional, according to science. The next pass (when you check that changes were correctly implemented) is a chance to improve on that.