restore test file

beautiful-racket/br/demo/jsonic/jsonic-test.rkt

@@ -1,2 +1,9 @@
 #lang br/demo/jsonic
-@$  $@
+{
+"string": @$(string-append "foo" "bar")$@,
+{
+"array": @$(range 5)$@,
+"object": @$(hash "k1" "valstring" (format "~a" 42) (hash "k1" (range 10) "k2" 42))$@
+}
+// "bar" :
+}