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This PR removes Segment#pythagorean_distance and TrackPoint#pythagorean_distance_from methods and one related test. It also adds two additional tests to the two remaining distance calculation methods (#haversine_distance_from and #law_of_cosines_distance_from) to ensure those methods work properly over distances spanning on the order of 100 km.
The PR also includes a bit of code formatting cleanup in the remaining distance methods (removing semicolons from line ends, making spacing consistent, and removing redundant return values).
This PR addresses Issue #27.