Follow-up to r19571.
Follow-up to r19571.

* subversion/libsvn_client/repos_diff.c (Copyright): Include 2005 in
  the range.

Found by: maxb

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