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[mypy-fix] Type fixes for graham_scan (#5589)

* [mypy] Fixes type annotations in other/graham_scan  #4052

+ Prefer tuple to list for point x,y pairs

* NOP: fixes typo in comment
A
Andrew Grangaard committed
2606f1bbe58dfc370ce1f35d3d9c51396e791fa6
Parent: f93c7d4
Committed by GitHub <noreply@github.com> on 10/26/2021, 9:50:36 AM