Enter on a toggle summary, tab title or accordion title moves the cursor
into the body below instead of splitting the line.
These titles are one line by construction: their parent's content is
exactly <title> <content>, so a split writes a second title into it, and
a split at the end of the line: where core starts a fresh paragraph rather
than a second block of the same type, writes a paragraph. Both leave the
toggle, tab item or accordion item holding content its type forbids.
Enter on a toggle summary, tab title or accordion title moves the cursor into the body below instead of splitting the line.
These titles are one line by construction: their parent's content is exactly
<title> <content>, so a split writes a second title into it, and a split at the end of the line: where core starts a fresh paragraph rather than a second block of the same type, writes a paragraph. Both leave the toggle, tab item or accordion item holding content its type forbids.