* subversion/include/private/svn_debug.h   (SVN_DBG):  Add a docstring.
* subversion/include/private/svn_debug.h
  (SVN_DBG):  Add a docstring.

jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion,jmckaskill/subversion