/* begin *

   patch 2.7.6 (apply a diff file to an original file or files)

   Patch is a utility used to apply diffs (or patches) to files, which
   are usually source code.

   Larry Wall wrote the original version of patch. Paul Eggert removed
   patch's arbitrary limits; added support for binary files, setting
   file times, and deleting files; and made it conform better to POSIX.
   Other contributors include Wayne Davison, who added unidiff support,
   and David MacKenzie, who added configuration and backup support.

 * end */