# File lib/test/unit/assertions.rb, line 1940
          def pretty_print(q)
            q.group(1, '{', '}') do
              q.seplist(self, nil, :each_pair) do |k, v|
                q.group do
                  q.pp(k)
                  q.text('=>')
                  q.group(1) do
                    q.breakable('')
                    q.pp(v)
                  end
                end
              end
            end
          end