eliminated internal command history -- superceeded by global Isar state (cf. isar.ML); added commit_exit; removed obsolete exception RESTART; init_theory: removed obsolete kill argument; removed obsolete undo_limit, undo_exit, kill, history; misc tuning;
eliminated internal command history -- superceeded by global Isar state (cf. isar.ML);
added commit_exit;
removed obsolete exception RESTART;
init_theory: removed obsolete kill argument;
removed obsolete undo_limit, undo_exit, kill, history;
misc tuning;

MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle,MerelyAPseudonym/isabelle