This patch modifies the tile layout to add a gap between clients that helps to visually differentiate between selected borders and normal borders and so provides an additional visual hint to identify the currently selected client. OTOH, there's no gap between a client and the screen frame in order to reduce the waste of screen space.
To configure the gap size just set the configuration variable
There is a variation of the patch for the xtile layout also.
- Carlos Pita (memeplex) email@example.com