Couple of issues with org block meta lines faces

[Sébastien Miquel]

Hi,

If you start emacs as follows, making sure emacs picks up the latest org 
from org-plus-contrib, and with file.org being the content of this mail,

#+BEGIN_SRC sh :async
emacs -q \
      --eval "(defface org-block-begin-line '((t (:background \"blue\" 
:height 0.8))) \"\")" \
      --eval "(setq org-fontify-whole-block-delimiter-line t)" \
      file.org
#+END_SRC

You may observe the following issues:

 1) begin-line applies to both begin and end lines. This might be 
intended. If you define an org-block-end-line face, it gets applied instead.
 2) org-fontify-whole-block-delimiter-line is ignored. I'm aware I can 
set the :extend t property to the face. If it does nothing, maybe this 
variable should be removed.
 3) The following block has no face applied.
    - This only happens when the line with # at the top is empty
    - The :height part of the face seems to be responsible
    - It also works fine with default org version
 4) If you go to the end of the fontified end_src line (first src 
block), then press enter a couple of times the buffer position has the 
org-block-begin-line face applied (move cursor to see it).

#
#+BEGIN_SRC elisp
auie
auriaest
#+END_SRC

Regards,