comment only: example of 2 monitor gaps

Config.hs

@@ -49,6 +49,11 @@ modMask = mod1Mask
 -- Anything non-zero here will leave a gap of that many pixels on the
 -- given edge, on the that screen. A useful gap at top of screen for a
 -- menu bar (e.g. 15)
+-- 
+-- An example, to set a top gap on monitor 1, and a gap on the bottom of
+-- monitor 2, you'd use a list of geometries like so:
+--
+-- > defaultGaps = [(18,0,0,0),(0,18,0,0)] -- 2 gaps on 2 monitors
 --
 -- Fields are: top, bottom, left, right.
 --