Have ancestor step ensure that no content-less wrapper type is used
Have ancestor step ensure that no content-less wrapper type is used

To avoid creating steps that can't be inverted

kiejo/prosemirror,adrianheine/prosemirror,adrianheine/prosemirror,tzuhsiulin/prosemirror,adrianheine/prosemirror,kiejo/prosemirror,tzuhsiulin/prosemirror,tzuhsiulin/prosemirror,kiejo/prosemirror,salzhrani/prosemirror,salzhrani/prosemirror,salzhrani/prosemirror