What's the diff?
Webster's New World
(computing) Any program which compares two files or sets of files and outputs a description of the differences between them.
(computing) The output of a diff program. A diff file.
(medicine) Abbreviation of differential: differential of types of white blood cell in a complete blood count.
(computing) To run a diff program on (files or items).
(computing) To produce a description of changes made to a collection of files. To produce a patch file.
(computing) To compare two files or other objects, manually or otherwise.
(computing) A program, historically part of the Unix operating system, which compares two files or sets of files and outputs a description of the differences between them.
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