This was very confusing for me too. The array it gives you is minemap = [[True, True, True], [False, False, True], [True, True, True]]. Each new minemap item is going across and each new minemap[x] item is going down, if that makes sence. So it would look like this

True(minemap[0][0])--------------------------------------False(minemap[1][0])--------------------------------------True(minemap[2][0])--------------------------------------------------------------------------------
True(minemap[0][1])--------------------------------------False(minemap[1][1])--------------------------------------True(minemap[2][1])--------------------------------------------------------------------------------
True(minemap[0][2])--------------------------------------True(minemap[1][2])--------------------------------------True(minemap[2][2])--------------------------------------------------------------------------------
Just ignore how the minemap looks in the test arrays. Hopefully this helped.