source :rubygems
<%- includes(:gemfile_prelude,'') do |prelude| -%>

<%= prelude -%>
<%- end -%>

gemspec
<%- includes(:gemfile,'') do |gemfile| -%>

<%= gemfile -%>
<%- end -%>
<%- includes(:gemfile_development,'') do |gemfile| -%>

group :development do
<%= gemfile -%>
end
<%- end -%>