3.13.1
CHANGES:
- list: TRMC was in 4.14, we can use it earlier
- fix insidious bug in CCList.flat_map linked to unspecified
evaluation order - perf: use
concat_mapforCCList.flat_mapon >= 5.1
(this also re-fixes the same bug inCCList.flat_mapanyway)
CHANGES:
concat_map for CCList.flat_map on >= 5.1CCList.flat_map anyway)