;;
let predefined_classes = [
+ ["*"; "∗"; ];
["/"; "⧸"; ];
["&"; "⅋"; ];
["|"; "❘"; "∥"; ];
["⇕"; "⇳"; "⬍"; "↕"; ];
["↔"; "⇔"; "⬄"; "⬌"; ] ;
["≤"; "≲"; "≼"; "≰"; "≴"; "⋠"; "⊆"; "⫃"; "⊑"; ] ;
- ["_"; "↓"; "↙"; "⇣"; "⇃"; "⇂"; "⎽"; "⎼"; "⎻"; "⎺"; "▿"; ];
+ ["_"; "â\86\93"; "â\86\99"; "â\87£"; "â\87\83"; "â\87\82"; "â\86³"; "â\8e½"; "â\8e¼"; "â\8e»"; "â\8eº"; "â\96¿"; ];
["<"; "≺"; "≮"; "⊀"; "〈"; "«"; "❬"; "❮"; "❰"; ] ;
["("; "❨"; "❪"; "❲"; "("; ];
[")"; "❩"; "❫"; "❳"; ")"; ];