add_special_chars	add_special_chars
add_whitespace	add_whitespace
change_case	change_case
duplicate_rows	duplicate_rows
make_missing	make_missing
messy	messy
messy_colnames	messy_colnames
messy_datetime_formats	messy-date-fmt
messy_datetime_tzones	messy_datetime_tzones
messy_date_formats	messy-date-fmt
split_dates	split-dates
split_datetimes	split-dates
