saddle-points: Add test for all saddle points (#724)
saddle-points: Add test for all saddle points (#724)

* Add test for all saddle points

It would be nice to cover case, when all points are actually saddle points.

* Add empty line to end of file

petertseng/exercism-rust,exercism/xrust,petertseng/exercism-rust,exercism/xrust,petertseng/exercism-rust