Merge branch 'no-highlight-files' into 'master'

Add "NEWS" to no_highlight_files

"NEWS" is used in gnu style opensource projects for the changelog. So let's add it to `no_highlight_files`.

See merge request !249

app/helpers/blob_helper.rb

@@ -17,7 +17,7 @@ module BlobHelper
   end
 
   def no_highlight_files
-    %w(credits changelog copying copyright license authors)
+    %w(credits changelog news copying copyright license authors)
   end
 
   def edit_blob_link(project, ref, path, options = {})