DOCS: Fix examples in documentation (#1435)

* Add example include

* Replace example includes

* Remove old example includes

docs/_functions/domain/NS.md

@@ -14,8 +14,7 @@ The difference between `NS()` and `NAMESERVER()` is explained in the `NAMESERVER
 
 Target should be a string representing the NS target. If it is a single label we will assume it is a relative name on the current domain. If it contains *any* dots, it should be a fully qualified domain name, ending with a `.`.
 
-{% include startExample.html %}
-
+{% capture example %}
 ```js
 D("example.com", REGISTRAR, DnsProvider("R53"),
   NS("foo", "ns1.example2.com."), // Delegate ".foo.example.com" zone to another server.
@@ -24,5 +23,6 @@ D("example.com", REGISTRAR, DnsProvider("R53"),
   A("ns2.example2.com", "10.10.10.20"), // Glue records
 );
 ```
+{% endcapture %}
 
-{% include endExample.html %}
+{% include example.html content=example %}