Missing `</form>` closing tag. May I ask what's the motivation with this? I was trying to read this from a user's perspective, and this addition doesn't seem to provide much value for me. In fact it'll probably generate more questions and confusion for me (Huh, what exactly is different? *metal diff-ing* Huh, so it's missing the `class` and `id`. When would I use this then? What's with the invisible `div` and the hidden field? etc. Notably the snippet above this chose to skip over the hidden `utf8` field and this does not).

I think the intention here is to focus on *how* you'd use `form_tag` with the `remote: true` option, and personally speaking the original copy seems adequate for that purpose, what do you think?

If anything, maybe we should add a link to the *guide* article for building forms.