From mboxrd@z Thu Jan  1 00:00:00 1970
From: Linus Torvalds <torvalds@linux-foundation.org>
Subject: Re: [PATCH] hex.c: reduce memory footprint of sha1_to_hex static buffers
Date: Fri, 13 Feb 2015 13:58:42 -0800
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To: Stefan Beller <sbeller@google.com>
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On Fri, Feb 13, 2015 at 1:56 PM, Stefan Beller <sbeller@google.com> wrote:
>
> As I could not find any documentation on the
> magical 50 in the early days, I cc'd Linus
> in case there is something I did not think of yet.

Nothing magical, it's just "rounded up from 40 + NUL character".

                        Linus