[O] Non-leading commas removed from src blocks

[Hsiu-Khuern Tang]

Hi Eric,

I think your commit 20044297 caused non-leading commas to be removed
from src blocks.  Example:

=====================
* test

  #+begin_src r
    a <- c(1
           , 2
           , 3)
  #+end_src
=====================

But I could be misunderstanding what "non-leading" means.

My original email about this is here:
http://article.gmane.org/gmane.emacs.orgmode/44977.

Thanks!

Hsiu-Khuern.