Commit b26fd532

 redid how xrandr prints
properties.  It neglected to put spaces between the values of XA_ATOM
properties, so they all run together.  For example,

    audio: auto
        supported: force-dvioffautoon

Fix this by putting a space after each atom name.  In addition, some drivers
create property values with spaces in them, so put commas between entries to
disambiguate.  For example,

    Broadcast RGB: Automatic
        supported: Automatic, Full, Limited 16:235

Do the same for properties with multiple valid ranges.

Signed-off-by: Aaron Plattner <aplattner@nvidia.com>
Reviewed-by: Peter Hutterer <peter.hutterer@who-t.net>