# File lib/rake.rb, line 819
819:   def verbose(value=nil)
820:     oldvalue = RakeFileUtils.verbose_flag
821:     RakeFileUtils.verbose_flag = value unless value.nil?
822:     if block_given?
823:       begin
824:         yield
825:       ensure
826:         RakeFileUtils.verbose_flag = oldvalue
827:       end
828:     end
829:     RakeFileUtils.verbose_flag
830:   end