make it more clear we're moving into panic mode

about_panics.go

@@ -4,7 +4,11 @@ func divideFourBy(i int) int {
   return 4 / i
 }
 
+const __divisor__ = 0
+
 func aboutPanics() {
-  n := divideFourBy(0)
+  assert(__delete_me__) // panics are exceptional errors at runtime
+
+  n := divideFourBy(__divisor__)
   assert(n == 2) // panics are exceptional errors at runtime
 }