BUG: fixed .abs on Series with a timedelta (partial fix for 2957)
BUG: Series.argsort failing on datetime64[ns] when NaT present, GH #2967
Merge pull request #2977 from jreback/argsort

BUG: Series.argsort failing on datetime64[ns] when NaT present, GH #2967
Merge pull request #2958 from jreback/timedelta_2957_new

BUG: fixed .abs on Series with a timedelta (partial fix for 2957)
TST: fix test on python3
ENH: add display.max_seq_items to limit len of pprinted long sequences
TST: add test for com.is_sequence