New show_information flag regression

[pmoura]

$ gprolog
GNU Prolog 1.6.0 (64 bits)
Compiled Jul 15 2023, 11:03:32 with /opt/local/bin/gcc-mp-12
Copyright (C) 1999-2023 Daniel Diaz

| ?- current_prolog_flag(show_information, V).

V = normal

yes
| ?- halt.

$ gprolog --quiet
| ?- current_prolog_flag(show_information, V).

V = normal

yes

This breaks using GNU Prolog in Jupyter notebooks running the Logtalk kernel. In the second case above, before this regression, the flag value was reported as off.

[pmoura]

It seems that the changed behavior resulted from the implementation of the show_banner flag. I have now switched to query this flag (when defined) at Logtalk startup.