Re: git-format-patch does not encode lines starting with "From"

> Summary
> =======
>
> git-format-patch in 2.32.0 fails to quote/escape lines starting with
> "From ", and mbox readers conclude there is an empty mail.
>
>
> Observed
> ========
>
> $ git commit -m 'subject
>
> From ffffffffffffffffffffffffffffffffffffffff Mon Sep 17 00:00:00 2001
> with love.'
> $ git format-patch HEAD^!
> $ head 0001-subject.patch
> From d489071b4855a49b32e9b5ae5addd982d2ed8d7d Mon Sep 17 00:00:00 2001
> From: Jan Engelhardt <jengelh@inai.de>
> Date: Sun, 27 Jun 2021 20:04:20 +0200
> Subject: [PATCH] subject
>
> From ffffffffffffffffffffffffffffffffffffffff Mon Sep 17 00:00:00 2001
> with love.
>
> $ git reset --hard HEAD^
> $ git am -p0 0001-subject.patch
> Patch is empty.
> When you have resolved this problem, run "git am --continue".
>
>
> Expected to see
> ===============
>
> $ head 0001-subject.patch
> From d489071b4855a49b32e9b5ae5addd982d2ed8d7d Mon Sep 17 00:00:00 2001
> From: Jan Engelhardt <jengelh@inai.de>
> Date: Sun, 27 Jun 2021 20:04:20 +0200
> Subject: [PATCH] subject
>
>>From ffffffffffffffffffffffffffffffffffffffff Mon Sep 17 00:00:00 2001
> with love.