added a false case for the isObject test documentation

index.html

@@ -1233,6 +1233,8 @@ _.isUndefined(window.missingVariable);
       <pre>
 _.isObject({});
 =&gt; true
+_.isObject('am I an object?');
+=&gt; false
 </pre>
       
       <h2 id="utility">Utility Functions</h2>