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dedup

Sequence.dedup

filter out consecutive duplicate elements using the
given relation.

Keep the order of elements unchanged.

ex.

Precondition
pre
  T : property.equatable
0.099dev (GIT hash 9b94ad4b4a4bff2bf2be7d77be2c6e1fd7683c4d)
last changed: 2026-09-23