patch: patch (apply a diff file to an original file or files)
patch:
patch: Patch is a utility used to apply diffs (or patches) to files, which
patch: are usually source code.
patch:
patch: Larry Wall wrote the original version of patch.  Paul Eggert removed
patch: patch's arbitrary limits; added support for binary files, setting
patch: file times, and deleting files; and made it conform better to POSIX.
patch: Other  contributors include Wayne Davison, who added unidiff support,
patch: and David MacKenzie, who added configuration and backup support.
patch: