To test the patch, the affected aras of the code still need to work (i.e. ally, public, PM chat) in SP and MP.
Sandaracs patch [[http://trac.wildfiregames.com/ticket/4431 | #4431]] uses this implicit change in the `/msg` case of `g_IsChatAddressee`.
So testing that patch with this one in combination would cover the /msg change.