doc-src/Intro/list.thy

a fixme comments about abs_fun_if, which should be called perm_if
and moved to the "bool"-section

List = FOL +
types 	list 1
arities list	:: (term)term
consts	Nil	:: "'a list"
   	Cons	:: "['a, 'a list] => 'a list" 
end