[Xmonad] "Empty" KeyMask: 0 vs AnyModifier vs ...?

[Daniel Wagner]

Andy Gimblett wrote:
> The following works:
>     , ((0,                  xK_F2    ), spawn "urxvt")
> but doesn't feel "right".  Is there a better candidate for the KeyMask

I think "none" is the magic word here, but I'm not sure:
     , ((none, xK_F2), spawn "urxvt")
(none is defined in X11-extras, so you may have to import something 
special, I haven't really tested this.)

g'luck!
~d