Merge pull request #220 from asgs/patch-1

reword the clause on equality of two json objects.

Author: Relequestual

jsonschema-core.xml

@@ -180,7 +180,7 @@
                         <t>both are strings, and are the same codepoint-for-codepoint; or</t>
                         <t>both are numbers, and have the same mathematical value; or</t>
                         <t>both are arrays, and have an equal value item-for-item; or</t>
-                        <t>both are objects, and each property in one has exactly one property with an equal key the other, and that other property has an equal value.</t>
+                        <t>both are objects, and each property in one has exactly one property with a key equal to the other's, and that other property has an equal value.</t>
                     </list>
                 </t>
                 <t>