added infix op also: 'a * ('a -> 'b) -> 'b; added set, reset, toggle: bool ref -> bool; added find_first, exists2, forall2, commas_quote, merge_rev_lists;
added infix op also: 'a * ('a -> 'b) -> 'b;
added set, reset, toggle: bool ref -> bool;
added find_first, exists2, forall2, commas_quote, merge_rev_lists;

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