odd b4 "Mail:" trailer added for USB patch

[Greg KH <gregkh@linuxfoundation.org>]

When running the following command that I normally do to apply patches:
	b4 am -S -t -o - | git am -s
from my email client, for the patch with:
	Message-ID: <20260206-wip-jremmet-hd3ss3220_vbus_split-v4-1-ee5b4e402187@phytec.de>

I get:

Looking up https://lore.kernel.org/all/20260206-wip-jremmet-hd3ss3220_vbus_split-v4-1-ee5b4e402187@phytec.de/
Analyzing 1 messages in the thread
Analyzing 11 code-review messages
Checking attestation on all messages, may take a moment...
---
  ✓ [PATCH v4] usb: typec: hd3ss3220: Check if regulator needs to be switched
 be switched") (✓ DKIM/phytec.de)typec: hd3ss3220: Check if regulator needs to
    + Mail: j.remmet@pyhtec.de (✓ DKIM/phytec.de)
  ---
  ✓ Signed: DKIM/phytec.de
---
Total patches: 1
---
 Link: https://patch.msgid.link/20260206-wip-jremmet-hd3ss3220_vbus_split-v4-1-ee5b4e402187@phytec.de
 Base: applies clean to current tree
Applying: usb: typec: hd3ss3220: Check if regulator needs to be switched


It's that odd "Mail:" header being added, which then shows up in the
commit itself:

    Fixes: 27fbc19e52b9 ("usb: typec: hd3ss3220: Enable VBUS based on role state")
    Signed-off-by: Jan Remmet <j.remmet@phytec.de>
    Reviewed-by: Heikki Krogerus <heikki.krogerus@linu.intel.com>
    Fixes: 7e7025811579 ("usb: typec: hd3ss3220: Check if regulator needs to ^M be switched")
    Mail: j.remmet@pyhtec.de
    Link: https://patch.msgid.link/20260206-wip-jremmet-hd3ss3220_vbus_split-v4-1-ee5b4e402187@phytec.de
    Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

Along with the extra "^M" in there (actual character) in the Fixes tag?

I'm using the latest git version of b4:

$ b4 --version
0.15-dev-47773

Any ideas?

thanks,

greg k-h