According to the UX experts you don’t need the space between the save and discard buttons as long as the “save” is the first one. Missclick are more prone to happen from top to bottom than the other way around, so if the user wanted to hit “save” it’s more likely he will click above the button than it is to click “discard”. Same logic applied down there, when the using is looking to cancel it’s easier to missclick and hit the “discard” button than anything else.