more permissive run_command: identity execution for empty toplevel, e.g. after malformed theory header;
more permissive run_command: identity execution for empty toplevel, e.g. after malformed theory header;

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