bug#52274: Gnus gcc header tokenization ignores space breaks multiple folder archive setup

[Mats Lidell]

Hi,

In commit 08ce17c2c0d32e200af3984d59f0b78ec500dc2c "Fix Gnus gcc header 
tokenization" space is removed form the tokenization of Gcc.

My setup with saving out going mails in two folders seems to have broken after 
that. My Gcc-header is setup like this:

    Gcc: <sent-folder><SPACE><mail-folder>

After the change "<sent-folder><SPACE><mail-folder>" seems to used for 
archiving causing some odd results.

I have configured gnus-message-archive-group to return a list of <sent-folder> 
and <mail-folder> so I am not tampering with the Gcc header directly.

Yours
-- 
%% Mats