Fix doxygen markup on a commnet.

* subversion/include/svn_fs.h: Fix doxygen markup above
SVN_FS_CONFIG_NO_SVNDIFF1.



git-svn-id: https://svn.apache.org/repos/asf/subversion/branches/svndiff1@857653 13f79535-47bb-0310-9956-ffa450edef68
1 file changed