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5 changes: 2 additions & 3 deletions README.org
Original file line number Diff line number Diff line change
Expand Up @@ -101,9 +101,8 @@ previously otherwise NULL.

** Insertion

Trees don't store duplicate keys, since rotations don't preserve the
binary search tree property in this case. If the user needs to do so,
then he can keep a separate list of all records having the same key.
Trees don't store duplicate keys. If the user needs to do so, then he
can keep a separate list of all records having the same key.

This is the reason why the insertion functions do insert a key only if
the key hasn't been already inserted. Otherwise it's equivalent to a
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