Extract tree/readme partial

app/views/tree/_readme.html.haml

+.file_holder#README
+  .file_title
+    %i.icon-file
+    = readme.name
+  .file_content.wiki
+    - if gitlab_markdown?(readme.name)
+      = preserve do
+        = markdown(readme.data)
+    - else
+      = raw GitHub::Markup.render(readme.name, readme.data)
\ No newline at end of file

app/views/tree/_tree.html.haml

@@ -12,7 +12,7 @@
 %div#tree-content-holder.tree-content-holder
   - if tree.is_blob?
-    = render partial: "tree/blob", object: tree
+    = render "tree/blob", blob: tree
   - else
     %table#tree-slider{class: "table_#{@hex_path} tree-table" }
       %thead
@@ -32,17 +32,8 @@
       = render_tree(tree.contents)
-    - if content = tree.contents.find { |c| c.is_a?(Grit::Blob) and c.name =~ /^readme/i }
-      .file_holder#README
-        .file_title
-          %i.icon-file
-          = content.name
-        .file_content.wiki
-          - if gitlab_markdown?(content.name)
-            = preserve do
-              = markdown(content.data)
-          - else
-            = raw GitHub::Markup.render(content.name, content.data)
+    - if readme = tree.contents.find { |c| c.is_a?(Grit::Blob) and c.name =~ /^readme/i }
+      = render "tree/readme", readme: readme
 - unless tree.is_blob?
   :javascript