improved wording in Schema primer

Section 2.3 "Simple Types" of the Schema Primer (http://www.w3.org/TR/xmlschema-0/) states
	Among these, the enumeration facet is particularly useful and it can be used to constrain the values of almost every 	simple type, except the boolean type. 
I recommend replacing
	of almost every simple type, except the boolean type. 
with
	of every simple type, except for boolean.

for greater clarity.

Donald Gignac	301-227-3348	"gignacda@nswccd.navy.mil"