Fix comment.
Fix comment.

* subversion/libsvn_ra_serf/options.c:
  (options_response_handler): update docstring

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