[BUG] wrapping links

[Tor Kringeland]

When a link goes over a (real) line wrap for indented lines, the leading
spaces get formatted as part of the link and this looks ugly.

#+begin_example
- [[this link looks
  ugly]]
#+end_example

It would be nice to at least have an option to disable formatting of the
leading (and trailing) spaces.  (Now I just try to keep all of the link
on one line, but this does not work well with `fill-paragraph'.)