Discussion on: Have you used the new "suggested changes" in GitHub pull requests?

Is it just me or is the way to suggest changes completely non-obvious? In which case I'm really surprised and confused why it is not mentioned here in the post or in the comments, or even linked to. I had to google for several minutes to figure out the syntax to put in a review comment:

```suggestion
        <div class="col-sm-10 col-md-8 col-lg-6 p-2">```

except maybe with a newline before the last triple backticks.