Fix typo in reference docs code sample (#793)

cjpatoilo · Jacob Wenger · commit d6d5c95b21f4 · 2016-06-21T12:59:24.000-07:00
diff --git a/docs/reference.md b/docs/reference.md
@@ -207,7 +207,7 @@ obj.$loaded(
 Returns the `Firebase` reference used to create this object.
 
 ```js
-var ob = $firebaseObject(ref);
+var obj = $firebaseObject(ref);
 obj.$ref() === ref; // true
 ```
 
