# File lib/rvm/shell/utility.rb, line 17
      def escape_argument(s)
        return "''" if s.empty?
        s.scan(/('+|[^']+)/).map do |section|
          section = section.first
          if section[0] == ?'
            "\\'" * section.length
          else
            "'#{section}'"
          end
        end.join
      end