# File lib/rake.rb, line 600
600:   def nowrite(value=nil)
601:     oldvalue = $fileutils_nowrite
602:     $fileutils_nowrite = value unless value.nil?
603:     if block_given?
604:       begin
605:         yield
606:       ensure
607:         $fileutils_nowrite = oldvalue
608:       end
609:     end
610:     oldvalue
611:   end