[css21] Wrong font-family syntax

The "Value" entry for 'font-family' currently says

[[ <family-name> | <generic-family> ] [, <family-name>| <generic-family>]*  
] | inherit

which is wrong since any instance of <generic-family> in the middle or end  
of the list will not get an immediately-preceding comma. It should be  
something like

[ [ <family-name> | <generic-family> ] [,[ <family-name> |  
<generic-family> ]]* ] | inherit

-- 
Øyvind Stenhaug
Core Norway, Opera Software ASA