b4: not possible to disable automatic commit changes

Hi all,

I was backporting a patch to linux stable and I added a [] tag after
the maintainer's SoB,
explaining the changes I made to the commit.

The [] tag, which spans two lines, was automatically moved by b4 to
the text section,
without warning me when sending.
Going through the documentation I didn't find an option to disable
such reordering.

For reference, I wanted to achieve [1], but I ended up with [2].

Signed-off-by: Paolo Abeni <[email protected]>
[LL: something something]
Signed-off-by: Luigi Leonardi <[email protected]>

but [LL: something something] was moved into the text part of the commit.

Did I miss something in the documentation?
If not, I think adding an option to disable the reordering would be great.

Thanks for the great work with b4,
Luigi

[1] https://lore.kernel.org/all/[email protected]/
[2] https://lore.kernel.org/all/[email protected]/