New in version 1.1.
Repeat sequence elements n times each:
abjad> from abjad.tools import sequencetools
abjad> sequencetools.repeat_sequence_elements_n_times_each((1, -1, 2, -3, 5, -5, 6), 2)
(1, 1, -1, -1, 2, 2, -3, -3, 5, 5, -5, -5, 6, 6)
Return newly constructed sequence object with copied sequence elements.
Changed in version 2.0: renamed listtools.repeat_elements_to_count() to sequencetools.repeat_sequence_elements_n_times_each().