Prelude: doc for set_default()
Prelude: doc for input_helper()
Prelude: style fix for input_helper() doc
Prelude: bugfix in doc: it was not for input_helper() but for input_safe()...
Prelude: doc for input_helper()
Data.List: removes uniq() with 2nd argument (it has been obsoleted)
Data.List: changelog for the previous change