activate e-3.1 as proposed by Martin Desharnais; enforce rebuild of Isabelle/ML;

more robust: avoid spurious crash of text_area.getText() in Active_Area.update();

proper bundle binomial_syntax; NB: precedence of "choose" changes silently from 65 to 64 in 200107cdd3ac, but old 65 was still seen in the wild;

build component for cvc5-1.2.0;

tuned whitespace;

clarified default_sort;

fewer theories;