type name 'str' in Synopsis

[Darren Duncan]

Looking at Synopsis 12, I notice that the "Enums" section refers to a 
"str" type, but Synopsis 6 doesn't, so there is an inconsistency here 
that needs correcting.

At first I thought S12 could be updated to use "Str" instead, but 
then when looking closer it seemed to me that the enum seemed to be 
operating like a C enum, where every value corresponds to a native 
integer, so perhaps "buf" is more appropriate.  Or alternately, we 
should see "Int" and "Str" here.

-- Darren Duncan