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The documentation of -S and -G is very sketchy. Completely rewrite the sections in Documentation/diff-options.txt and Documentation/gitdiffcore.txt. References: 52e95789 ([PATCH] Introducing software archaeologist's tool "pickaxe".) f506b8e8 (git log/diff: add -G<regexp> that greps in the patch text) Inputs-from: Phil Hord <phil.hord@gmail.com> Co-authored-by: Junio C Hamano <gitster@pobox.com> Signed-off-by: Ramkumar Ramachandra <artagnon@gmail.com> Signed-off-by: Junio C Hamano <gitster@pobox.com>
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