extended dwm.1 with last change

dwm.1

@@ -87,7 +87,7 @@ Close focused window.
 Toggle between tiling and floating mode (affects all windows).
 .TP
 .B Mod1-Shift-space
-Toggle focused window between floating and non-floating state.
+Toggle focused window between floating and non-floating state (tiling mode only).
 .TP
 .B Mod1-[1..n]
 View all windows with