Add not about nested conditions

SamyPesse · SamyPesse · commit cc63adff0a3d · 2014-04-02T19:02:59.000-07:00
diff --git a/conditional/if.md b/conditional/if.md
@@ -31,6 +31,8 @@ var message = 'this is ' + country + ', the weather is ' +
             'currency is ' + currency;
 ```
 
+**Node:** Conditions can also be nested.
+
 ---
 
 Fill up the value of `name` to validate the condition.
