remove hidden fact about hidden constant from code generator setup

for extraction -- use the exhaust rule that's registered with 'datatype_realizer.ML'

compile

updated certificates

tuned message

tabled, v.: postpone consideration of

adapted to renaming of 'Projl' and 'Projr'

adapted to 'xxx_{case,rec}' renaming, to new theorem names, and to new variable names in theorems * * * more transition of 'xxx_rec' to 'rec_xxx' and same for case * * * compile * * * 'rename_tac's to avoid referring to generated names * * * more robust scripts with 'rename_tac' * * * 'where' -> 'of' * * * 'where' -> 'of' * * * renamed 'xxx_rec' to 'rec_xxx'

adapted theories to 'xxx_case' to 'case_xxx' * * * 'char_case' -> 'case_char' and same for 'rec' * * * compile * * * renamed 'xxx_case' to 'case_xxx'

renamed 'nat_{case,rec}' to '{case,rec}_nat'