From mboxrd@z Thu Jan  1 00:00:00 1970
From: Junio C Hamano <gitster@pobox.com>
Subject: Re: detecting rename->commit->modify->commit
Date: Thu, 01 May 2008 19:38:38 -0700
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Cc: "Teemu Likonen" <tlikonen@iki.fi>, "Jeff King" <peff@peff.net>,
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To: "Sitaram Chamarty" <sitaramc@gmail.com>
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 (Sitaram Chamarty's message of "Fri, 2 May 2008 07:36:18 +0530")
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"Sitaram Chamarty" <sitaramc@gmail.com> writes:

> On Fri, May 2, 2008 at 2:09 AM, Teemu Likonen <tlikonen@iki.fi> wrote:
>
>>  -M" didn't detect the rename but "git diff -M4" did. To me it looks like
>>  this works nicely, better than I expected, actually.
>
> err... I didn't realise -M had an option, and I just double checked
> the man pages for diff, diff-files, diff-index, and diff-tree.  What
> does the 4 mean?

The option to -M<num>, -C<num>, -B<num>/<num> are "raise or lower the
similarity threshold to <num> / 10^N" where N is the number of digits in
<num>.  IOW, you will always be expressing number between 0 and 1.

You should also be able to say -M40% but that is an ancient part of the
code base so I might be misremembering things.