Update to 1.1903
    
    - New upstream release 1.1903
      - Fix documentation typos (CPAN RT#84981)
      - Add -w and -i switches to diffnew.pl (CPAN RT#69945)
      - Remove Algorithm::DiffOld from the index; the module is still distributed
        with Algorithm::Diff, but is not indexed on CPAN because this is an
        ***UNAUTHORIZED*** release of Algorithm::DiffOld
    - Add patch to generate provide for perl(Algorithm::DiffOld)
    - Drop %defattr, redundant since rpm 4.4
    - General spec tidy-up