locations are handled for empty value in render phase explanations

Author: parthrdesai

src/reports/timeline.rkt

@@ -366,7 +366,7 @@
                                   (td (b ,(~a expl)))
                                   (td ,(~a cnt))
                                   (td ,(~a mcnt))
-                                  (td ,(~a locations)))
+                                  (td ,(~a safe-locations)))
                              (for/list ([flow (in-list (or flows '()))])
                                (match-define (list ex type v) flow)
                                `(tr (td "↳") (td (code ,(~a ex))) (td ,type) (td ,(~a v)))))))))))))