adjust 86a91d675d to bring back the "expression:" field of

a failed test

or, in other words, make a top-level check-equal? more like a
check-equal? inside a test-suite that runs in verbose mode

(except that a top-level one limits the output to error-print-width
 characters, but the one inside a test-suite doesn't seem to do that)

rackunit-lib/rackunit/private/format.rkt

@@ -84,6 +84,11 @@
                                        (location->string
                                         (check-info-value info)))
                                       (λ (x) (printf "~a\n" x))))
+      ((check-expression? info)
+       (display-check-info-name-value max-name-width
+                                      (check-info-name info)
+                                      (check-info-value info)
+                                      (λ (x) (printf "~.s\n" x))))
       (else
        (display-check-info-name-value max-name-width
                                       (check-info-name info)
@@ -96,8 +101,7 @@
 ;; display-check-info-stack : (listof check-info) -> void
 (define (display-check-info-stack check-info-stack)
   (display-verbose-check-info-stack
-   (filter (λ (x) (not (check-expression? x)))
-           (strip-redundant-params check-info-stack)))
+   (strip-redundant-params check-info-stack))
   (newline))
 
 ;; display-test-name : (U string #f) -> void

rackunit-test/tests/rackunit/standalone.rkt

@@ -49,6 +49,7 @@ FAILURE
 name:       check
 location:   standalone-check-test.rkt:48:0
 params:     (#<procedure:=> 1 2)
+expression: (check = 1 2)
 message:    0.0
 
 Check failure
@@ -75,6 +76,7 @@ name:       check-eq?
 location:   standalone-test-case-test.rkt:23:12
 actual:     1
 expected:   2
+expression: (check-eq? 1 2)
 
 Check failure
 --------------------
@@ -85,6 +87,7 @@ name:       check-eq?
 location:   standalone-test-case-test.rkt:24:21
 actual:     1
 expected:   2
+expression: (check-eq? 1 2)
 
 Check failure
 --------------------