reflect determinism improvement thanks to the latest changes
Example:
?- http_open("https://github.com/mthom/scryer-prolog", S, []).
- %@ S = '$stream'(0x7f86f94a6cd0)
- %@ ; false.
+ %@ S = '$stream'(0x7fcfc9e00f00).
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - */
