test: cover editable playground includes

Author: coyaSONG

tests/testsuite/includes.rs

@@ -83,6 +83,13 @@ fn playground_include() {
 </span><span class="boring">   // You can even hide lines! :D
 </span><span class="boring">  println!("I am hidden! Expand the code snippet to see me");
 </span>}</code></pre>
+<h2 id="editable-playground"><a class="header" href="#editable-playground">Editable Playground</a></h2>
+<pre class="playground"><code class="language-rust editable">fn main() {
+    println!("Hello World!");
+<span class="boring">
+</span><span class="boring">   // You can even hide lines! :D
+</span><span class="boring">  println!("I am hidden! Expand the code snippet to see me");
+</span>}</code></pre>
 "##]]);
 }
 

tests/testsuite/includes/all_includes/src/playground.md

@@ -1,3 +1,7 @@
 # Playground Includes
 
 {{#playground example.rs}}
+
+## Editable Playground
+
+{{#playground example.rs editable}}