I made some different edits to the note to slim it down, and also put the fact that conforming content can claim exemptions first since it's more important than the stuff about "none" (which I'm not sure we should be saying is best practice here when we don't call that out in the accessibility spec).

If you want to make suggestions to a full paragraph, the best way is to either copy the text and edit it in your comment or, better, use github's suggestion feature. You just have to drag the + sign down to cover all the lines you want to amend and then click the suggestion button. Github will make a diff of whatever you change the suggested text to, plus it can be committed directly. I'll copy a screenshot of what I mean below.

(It's sometimes hard to be sure what people want changed when addressing single lines at a time. The first edit, for example didn't seem to follow into the next line, and the last suggestion appeared to be the same text that was there.)

Matt, thank you!

It would be much easier to comment on the whole paragraph. Sometimes I have that option and sometimes I don’t. I’ll try working in another browser to see if I get more consistent options.