Extends bash completion to handle "svn diff --extensions ..." values. 
Extends bash completion to handle "svn diff --extensions ..." values. 

* tools/client-side/bash_completion: improved _svn()

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