Summary

	images as output	test results	signature report
bsl	❌ ¹	✅ ²
bsl+	❌ ³	✅ ⁴
isl
isl+			❓ ⁵
asl

Tests are with racket-mode 20230628git0-1, Emacs 29.1 and racket 8.10 on Debian.

Signature report test

#lang htdp/isl+

(: Foldr ((%a %a -> %a) String (ListOf %a) -> %a))
(define (Foldr combine base lst)
  (cond
    [(empty? lst) base]
    [else (combine
            (first lst)
            (Foldr combine base (rest lst)))]))

(define (sum-list lst) (Foldr + 0 lst))

(sum-list '(1 2 3))

evaluating (circle 10 'outline "red") displays as #<image>↩︎
line wrapping interacts a bit weirdly with the boxes, but it remains legible, and recovers if window is widened.↩︎
evaluating (circle 10 'outline "red") displays as #<image>↩︎
line wrapping interacts a bit weirdly with the boxes, but it remains legible, and recovers if window is widened.↩︎
signature violations are not reported in racket-mode by default. With prefix argument racket-test reports the somewhat cryptic
```
; got 0
; Context (errortrace):
;    /home/bremner/sigtest.rkt:11:23: (Foldr + 0 lst)
```
for the Signature report test code.↩︎