restore old layout to index

Author: bishabosha

_layouts/documentation.html

@@ -26,7 +26,10 @@ <h1>{{page.title}}</h1>
  </section>
 
   <section class="table-of-content">
-    <div class="wrap">
+    <div class="wrap scala2">
+      <div class="language-header">
+        <h1>Scala 2</h1>
+      </div>
       <div class="inner-box">
         <div class="language-dropdown inverted">
           <div id="dd" class="wrapper-dropdown" tabindex="1">
@@ -56,6 +59,18 @@ <h1>{{page.title}}</h1>
         </ul>
 
         {% include documentation-sections.html sections=page.scala2-sections %}
+      </div>
+    </div>
+
+    <div class="wrap scala3">
+      <div class="language-header">
+        <h1>Scala 3</h1>
+      </div>
+      <div class="inner-box">
+        <blockquote>
+          We are still in the process of writing the documentation for Scala 3.
+          You can <a href="/scala3/contribute-to-docs.html">help us to improve the documentation</a>.
+        </blockquote>
         {% include documentation-sections.html sections=page.scala3-sections %}
       </div>
     </div>

index.md

@@ -1,5 +1,5 @@
 ---
-layout: documentation
+layout: inner-page-documentation
 languages: [ja, zh-cn, ru, uk]
 title: Learn Scala
 namespace: root
@@ -10,7 +10,7 @@ redirect_from:
   - /scala3/
   - /scala3/index.html
 
-scala2-sections:
+sections:
   - title: "First Steps..."
     links:
       - title: "Getting Started"