Enable markdown formatting for snippets in projects.

app/views/projects/snippets/_blob.html.haml

@@ -6,9 +6,5 @@
       .btn-group.tree-btn-group.pull-right
         - if can?(current_user, :admin_project_snippet, @project) || @snippet.author == current_user
           = link_to "Edit", edit_project_snippet_path(@project, @snippet), class: "btn btn-tiny", title: 'Edit Snippet'
-        = link_to "raw", raw_project_snippet_path(@project, @snippet), class: "btn btn-tiny", target: "_blank"
-  .file-content.code
-    - unless @snippet.content.empty?
-      = render 'shared/file_hljs', blob: @snippet
-    - else
-      %p.nothing_here_message Empty file
+        = link_to "Raw", raw_project_snippet_path(@project, @snippet), class: "btn btn-tiny", target: "_blank"
+  = render 'snippets/blob_content'

app/views/snippets/_blob.html.haml

@@ -8,17 +8,4 @@
           = link_to "Edit", edit_snippet_path(@snippet), class: "btn btn-tiny", title: 'Edit Snippet'
           = link_to "Delete", snippet_path(@snippet), method: :delete, data: { confirm: "Are you sure?" }, class: "btn btn-tiny", title: 'Delete Snippet'
         = link_to "Raw", raw_snippet_path(@snippet), class: "btn btn-tiny", target: "_blank"
-  - unless @snippet.content.empty?
-    - if gitlab_markdown?(@snippet.file_name)
-      .file-content.wiki
-        = preserve do
-          = markdown(@snippet.data)
-    - elsif markup?(@snippet.file_name)
-      .file-content.wiki
-        = render_markup(@snippet.file_name, @snippet.data)
-    - else
-      .file-content.code
-        = render 'shared/file_hljs', blob: @snippet
-  - else
-    .file-content.code
-      %p.nothing_here_message Empty file
+  = render 'snippets/blob_content'

app/views/snippets/_blob_content.html.haml

+- unless @snippet.content.empty?
+  - if gitlab_markdown?(@snippet.file_name)
+    .file-content.wiki
+      = preserve do
+        = markdown(@snippet.data)
+  - elsif markup?(@snippet.file_name)
+    .file-content.wiki
+      = render_markup(@snippet.file_name, @snippet.data)
+  - else
+    .file-content.code
+      = render 'shared/file_hljs', blob: @snippet
+- else
+  .file-content.code
+    %p.nothing_here_message Empty file