TUTORIAL: Only user letter keys for the bindings
TUTORIAL: Only user letter keys for the bindings

On IRC an issue came up where a user couldn't press M-] since they were
using a German keyboard layout and ] is put behind some AltGr
combination.  The correct way to specify that would be something along
the lines of M-M5-9, but we don't really want to go into that in the
tutorial.  Thus, only use the obvious modifiers, as well as letters,
which should work on every layout.

xmonad/xmonad