(svn_fs_apply_textdelta):  augment docstring.
(svn_fs_apply_textdelta):  augment docstring.

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