$print-prototype-with-braces
special-variable
When true, prototypes are printed like {...} otherwise like #s(...).
make-html > (do
(let $print-prototype-with-braces true)
(write-line (new :a 1 :b 2)))
{ :a 1 :b 2 }
make-html > (do
(let $print-prototype-with-braces false)
(write-line (new :a 1 :b 2)))
#s(:a 1 :b 2)