[BUG] suppress-cc does not support multiple keywords

I hope this isn't just some user error on my part, but whenever I use the --suppress-cc option, and I specify more than one keyword (e.g. --suppress-cc=author,self ), git complains that it doesn't recognize the keyword. It seems that it treats all of the comma-separated keywords as one big keyword with commas in it.

Here's the git-bugreport:

Thank you for filling out a Git bug report! Please answer the following questions to help us understand your issue.

What did you do before the bug happened? (Steps to reproduce your issue)

git send-email --suppress-cc=author,self ...

What did you expect to happen? (Expected behavior)

The command to succeed, excluding "author" and "self" from the automatic CC.

What happened instead? (Actual behavior)

Unknown --suppress-cc field: 'author,self'

What's different between what you expected and what actually happened?

The --suppress-cc command should accept multiple keywords.

Anything else you want to add:

I was able to work around the problem by specifying --suppress-cc multiple times, once for each keyword.

[System Info]
git version 2.50.1
cpu: x86_64
no commit associated with this build
sizeof-long: 8
sizeof-size_t: 8
shell-path: /bin/sh
libcurl: 8.5.0
zlib: 1.3
SHA-1: SHA1_DC
SHA-256: SHA256_BLK
uname: Linux 6.14.0-27-generic #27~24.04.1-Ubuntu SMP PREEMPT_DYNAMIC Tue Jul 2>
compiler info: gnuc: 13.3
libc info: glibc: 2.39
$SHELL (typically, interactive shell): /bin/bash

[Enabled Hooks]