(* *)+− +− open_file_prelude +− "Tactical_Code.thy"+− (cat_lines ["theory Tactical", +ÃÆâ€ââ€ÃÆâ€™ÃƒÂ¢Ã¢â€šÂ¬Ã‚¦Ãƒâ€šÃ‚¾ÃƒÆ’‚¢ÃƒÆ’ƒâ€šÃ‚¢Ãƒâ€¹Ã¢â‚¬Â ÃƒÂ¢Ã¢â€šÂ¬Ã¢â€žÂ¢ "imports Base FirstSteps", +− "begin"])+−