Allow custom comment for sources list

manifests/source.pp

@@ -2,6 +2,7 @@
 # add an apt source
 
 define apt::source(
+  $comment           = $name,
   $ensure            = present,
   $location          = '',
   $release           = 'UNDEF',

spec/defines/source_spec.rb

@@ -74,7 +74,12 @@ describe 'apt::source', :type => :define do
       end
 
       let :content do
-        content = "#file generated by puppet\n# #{title}"
+        content = "#file generated by puppet\n"
+	if param_hash[:comment]
+	  content << "# #{comment}"
+	else
+	  content << "# #{title}"
+	end
         if param_hash[:architecture]
           arch = "[arch=#{param_hash[:architecture]}] "
         end

templates/source.list.erb

@@ -1,5 +1,5 @@
 #file generated by puppet
-# <%= @name %>
+# <%= @comment %>
 deb <% if @architecture %>[arch=<%= @architecture %>] <% end %><%= @location %> <%= @release_real %> <%= @repos %>
 <%- if @include_src then -%>
 deb-src <% if @architecture %>[arch=<%= @architecture %>] <% end %><%= @location %> <%= @release_real %> <%= @repos %>