fixing message

Author: AndrewSC

jsonschema/_validators.py

@@ -306,7 +306,7 @@ def maxProperties_draft4(validator, mP, instance, schema):
     if not validator.is_type(instance, "object"):
         return
     if validator.is_type(instance, "object") and len(instance) > mP:
-        yield ValidationError("%r is too short" % (instance,))
+        yield ValidationError("%r is too long" % (instance,))
 
 
 def allOf_draft4(validator, allOf, instance, schema):