tuned;

tuned caret_listener/selected_command;

misc tuning;

eliminated global Session.document_0 -- did not work due to hardwired id; more precise Session.begin_document, avoid race on var prover; replaced slightly odd Session.document_versions by Sassion.documents table (cf. src/Pure/Isar/isar_document.ML); simplified edit_document in ML: initial empty command is identified by ""; misc tuning;

tuned;

tuned;

Standard_System;

slightly larger stack size -- default seems to be as low as 256k;

back to activate=startup (again) -- ensure that Isabelle_Encoding refers to valid Isabelle.system;

adapted to class Outer_Syntax;