# File lib/gemnasium/configuration.rb, line 67
    def migrate!
      # replace profile_name key with project_slug key (no value)
      content = File.readlines(path).map do |line|
        if line =~ /\Aprofile_name:.*\Z/
          "project_slug:"
        else
          line
        end
      end.map{ |l| l.rstrip }.join("\n") + "\n"

      File.write path, content
    end