zulip/servers/puppet/modules/puppet-apt/templates/ppa-list.erb

<% ppa.each do |one_ppa| %>
deb http://ppa.launchpad.net/<%= name %>/<%= one_ppa %>/ubuntu <%= lsbdistcodename %> main
deb-src http://ppa.launchpad.net/<%= name %>/<%= one_ppa %>/ubuntu <%= lsbdistcodename %> main
<% end %>