[Haskell] re:please help!haskell

[M.I.Azad1 at Bradford.ac.uk]

hi could somebody please explain how everything works in this function? and why
is 'list' there?
any help will be much apprecited
Regards
Imran
all_rotations :: [a] -> [[a]]
all_rotations xs =  take (length xs) (iterate list xs)
list xs = tail xs ++ [head xs]

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