Feature request: preserving plain list line breaks in exporting

[Wanrong Lin <wanrong.lin@gmail.com>]

Hi,

Suppose I have a plain list as the following:

* TODO Read books
  1. [ ] Book 1
         Note: blah blah blah
  2. [ ] Book 2
         Note: blah blah blah

When the above is exported to HTML, the line breaks after the "heading 
line" of each list item are lost, so it becomes "Book1 Note: blah blah 
blah", which does not look very nice to me. I know I can keep the line 
breaks by inserting a blank line, like this:

* TODO Read books
  1. [ ] Book 1

         Note: blah blah blah
  2. [ ] Book 2

         Note: blah blah blah

Well, this will fix the export, but the text above looks ugly now, 
especially when the "Note" part is very short.

Can we add some kind of option to control whether the line break after 
the first line of a plain list item should be preserved in exporting? Or 
maybe we can assume the line breaks should be preserved when 
"org-cycle-include-plain-lists" is set to "t", since in that case we are 
treating the plain list item kind of like a heading.

Note setting "org-export-preserve-breaks" does not meet my needs, since 
that will preserve ALL breaks.

Thanks for giving the above a thought.

Wanrong