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+This package contains four tools to ease creating and maintaining
+patches for pkgsrc: mkpatches, patchdiff, pkgdiff, and pkgvi.
+
+pkgdiff compares two files (like diff) and produces an output file
+that can be used in pkgsrc.
+
+mkpatches automatically generates a set of patches, if the original
+versions of the files had been saved as filename.orig.
+
+patchdiff compares a previously existing set of patches with another
+one created by mkpatches, and outputs any changes.
+
+pkgvi makes backup copies if a file is changed, so pkgdiff can be run
+on it later, generating a patch for the changes made.