# File lib/rspec-puppet/setup.rb, line 103
    def self.safe_create_file(filename, content)
      if File.exists? filename
        old_content = File.read(filename)
        if old_content != content
          $stderr.puts "!! #{filename} already exists and differs from template"
        end
      else
        File.open(filename, 'w') do |f|
          f.puts content
        end
        puts " + #{filename}"
      end
    end