Remove stray comma.

Author: handrews

jsonschema-validation.xml

@@ -827,7 +827,7 @@
                     </t>
                     <t>
                         Implementations MAY support additional attributes using the other
-                        production names defined in that section.  If "full-date" or "full-time",
+                        production names defined in that section.  If "full-date" or "full-time"
                         are implemented, the corresponding short form ("date" or "time"
                         respectively) MUST be implemented, and MUST behave identically.
                         Implementations SHOULD NOT define extension attributes