jraregris/advent2020 - Change MNRSVK3AOYLQPU4N67URDVSTQ4S6NHJTJXFQWJGZ7BWZFBKIURPQC

Add test for going left

Created by on December 9, 2020

MNRSVK3AOYLQPU4N67URDVSTQ4S6NHJTJXFQWJGZ7BWZFBKIURPQC

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Change contents

Insertion in 03/tobboggan_trajectory.exs at line 14 [4.27]
[2.290]
[3.64]
```
    "?" = TobogganTrajectory.get_cell_in_level(".!?", -1)
```