The "normal" diff output format shows each hunk of differences
without any surrounding context. Sometimes such output is the clearest
way to see how lines have changed, without the clutter of nearby
unchanged lines (although you can get similar results with the context
or unified formats by using 0 lines of context). However, this format
is no longer widely used for sending out patches; for that purpose, the
context format (see section Context Format) and the unified format
(see section Unified Format) are superior. Normal format is the default for
compatibility with older versions of diff and the Posix standard.
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