Use destructuring
Rename Point2D -> Point, Line2D -> Line and {start,end,midpoint,make}-segment -> {start,end,midpoint,make}-line
2.46
2.47
Whitespaces
Upgrade `core.typed` and delete duplicated annotations
Use `lazy-seq`
Add `combination2`
2.42 and 2.43
2.48
2.49
2.50
2.51
2.44
2.45
Bug: Fix 2.51
Cleanups