Chrome + Inline Tasks: Enter+Enter creates a <div/>

When you exit an Inline Task list in Chrome, a <div/> is created instead of a <p/>.

Steps to reproduce:

1. Type a paragraph
2. Type [] then the title of an inline task
3. Type Enter
4. Type Enter
5. It looks like you're editing a paragraph, but it's actually a <div/>.
   However, I've noticed it doesn't happen on this page: https://pug.jira.com/wiki/pages/editpage.action?pageId=114819082 , but it does if you erase its contents and type an Inline Task List from scratch.

Results:

• When you create a new Inline Task list again, it sticks to the last paragraph (no space before the line)
• If I fix numChildren == 0 ? true : numChildren == 1 && (li.firstChild.tagName == '' || li.firstChild.tagName == 'BR' || li.firstChild.nodeValue == "\uFEFF" || isEmptyIE9Li(li)) into li.textContent.trim().length == 0,
  • Both would create the 2nd paragraph with a span & br inside. FF would put _moz_dirty="" in it.
  • FF has a little problem with the 2nd list. It applies a zero height and makes it become a ghost element if you don't type immediately.
  • Chrome, when adding the 2nd list, would remove it and come back to the previous paragraph.

Hydracode.