ref_remove_duplicates(): simplify loop logic
Change the loop body into the more straightforward * remove item from the front of the old list * if necessary, add it to the tail of the new list and return a pointer to the new list (even though it is currently always the same as the input argument, because the first element in the list is currently never deleted). Signed-off-by: NMichael Haggerty <mhagger@alum.mit.edu> Signed-off-by: NJunio C Hamano <gitster@pobox.com>
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