more Isabelle symbol definitions for Z Notation, based on https://github.com/isabelle-utp/Z_Toolkit 998c9f7880d3 by Simon Foster; NB: no bold version of 0x2900 due to fontforge crash "Internal Error: Some fragments did not join";

tuned message;

proper directory of settings file; tuned;

tuned lemma

added lemma

tuned signature;

tuned signature (again);

tuned --- following hints by IntelliJ;

tuned comments;

proper shell quote;