[hotfix!] Fixes #410: Wrong result got from get_distance.

[jackiekazil]

No description provided.

[jackiekazil]

Looking for someone to do a review.

[coveralls]

Coverage increased (+0.05%) to 82.177% when pulling d1fbc82 on 410_fix_distance into 275674d on master.

[JamesArruda]

Looks good. One suggestion is to put the second distance calculation and the min statement inside the if self.torus: block to avoid an excess linalg.norm call.

Does this change how get_heading will behave? Should that heading be based on the minimum distance, too?

EDIT: I was doing some testing and came to the conclusion that the modding usually works for the torus distance, but there are cases where it won't work. See this comment: #410 (comment)

[Corvince]

Closing this in favor of #430