Revert "Threshold sizes should all be printed on one line"
Revert "Threshold sizes should all be printed on one line"

This reverts commit a1b479e6a8d1741eea91c1683461c28b4eb5c716.

It broke
[stuff](https://github.com/diku-dk/futhark/runs/2095121866?check_suite_focus=true)
and didn't fix the problem.

diku-dk/futhark,HIPERFIT/futhark,diku-dk/futhark,diku-dk/futhark,diku-dk/futhark,diku-dk/futhark,HIPERFIT/futhark,HIPERFIT/futhark