induct: support local definitions to be passed through the induction; deprecate open rule cases; misc cleanup;
induct: support local definitions to be passed through the induction;
deprecate open rule cases;
misc cleanup;

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