[update] Show difference between versions + [update] button

test-folder/folder-2/test-3-diff-2.js

@@ -0,0 +1,15 @@
+'use strict'
+
+/**
+ * Test
+ */
+class Pwet extends AnotherClass
+{
+    constructor( argument )
+    {
+        console.log('Hello')
+        console.log('World')
+    }
+}
+
+let pwet = new Pwet()