pragmatism first

xzcmp, xzdiff, lzcmp, lzdiff

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This manual	Reference	Other manuals
xzdiff(1)	referred by	xz(1)
xzdiff(1)	refer to	bzip2(1) \| cmp(1) \| diff(1) \| gzip(1) \| lzop(1) \| xz(1) \| zdiff(1)