improve unsafe-linklet error message

pkgs/racket-test-core/tests/racket/sandbox.rktl

@@ -463,7 +463,7 @@
         ;; timestamp .zo file (needed under Windows):
         (file-or-directory-modify-seconds ,test-zo (current-seconds))
         ;; loading 'test gets 'list module declaration via ".zo"
-        (load/use-compiled ,test-lib) =err> "cannot use linklet loaded with non-original code inspector"
+        (load/use-compiled ,test-lib) =err> "cannot use unsafe linklet loaded with non-original code inspector"
         (delete-file ,test-zo) => (void)
         (delete-file ,test-lib) =err> "`delete' access denied"
         --top--
@@ -480,7 +480,7 @@
         (cp ,list-lib ,test-lib)  (cp ,list-zo ,test-zo)
         (cp ,list-lib ,test2-lib) (cp ,list-zo ,test2-zo)
         ;; bytecode from test-lib is bad, even when we can read/write to it
-        (load/use-compiled ,test-zo) =err> "cannot use linklet loaded with non-original code inspector"
+        (load/use-compiled ,test-zo) =err> "cannot use unsafe linklet loaded with non-original code inspector"
         ;; bytecode from test2-lib is explicitly allowed
         (load/use-compiled ,test2-lib)
         (require 'list) => (void))

racket/src/bc/src/linklet.c

@@ -335,7 +335,7 @@ static void check_linklet_allowed(const char *who, Scheme_Linklet *linklet)
 {
   if (linklet->reject_eval) {
     scheme_raise_exn(MZEXN_FAIL,
-                     "%s: cannot use linklet loaded with non-original code inspector",
+                     "%s: cannot use unsafe linklet loaded with non-original code inspector",
                      who);
   }
 }

racket/src/cs/linklet.sls

@@ -671,7 +671,7 @@
       [(faslable-unsafe)
        (raise (|#%app|
                exn:fail
-               "eval-linklet: cannot use linklet loaded with non-original code inspector"
+               "eval-linklet: cannot use unsafe linklet loaded with non-original code inspector"
                (current-continuation-marks)))]
       [else
        linklet]))