Merge pull request #297 from frconil/sourceslist-comment

adding notice on top of sourceslist files

spec/defines/source_spec.rb

@@ -74,7 +74,7 @@ describe 'apt::source', :type => :define do
       end
 
       let :content do
-        content = "# #{title}"
+        content = "#file generated by puppet\n# #{title}"
         if param_hash[:architecture]
           arch = "[arch=#{param_hash[:architecture]}] "
         end

templates/source.list.erb

@@ -1,3 +1,4 @@
+#file generated by puppet
 # <%= @name %>
 deb <% if @architecture %>[arch=<%= @architecture %>] <% end %><%= @location %> <%= @release_real %> <%= @repos %>
 <%- if @include_src then -%>