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A.17 rdiff--'patch' format diffs between releases

Builds a Larry Wall format patch(1) file between two releases, that can be fed directly into the patch program to bring an old release up-to-date with the new release. The diff output is sent to the standard output device.

You can specify (using the standard `-r' and `-D' options) any combination of one or two revisions or dates. If only one revision or date is specified, the patch file reflects differences between that revision or date and the current head revisions in the RCS file.

Note that if the patch created by rdiff spans multiple directories, then it may be necessary to specify the `-p' option when feeding the patch back to the patch command, so that patch is able to update files that are located in directories other than the one patch is run in.


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