Format decimal numbers about numbro

[BenjaminVanRyseghem]

for the first bullet, you can try ,0 as format

for the second bullet, I do not know if leaving the decimal untouched is supported (yet?)
I tried something like 0. but it didn't work (as you can see here)

I will have a deeper look tomorrow, and hopefully propose a fix for it

[karellm]

I forgot to mention I tried all I could think of: 0,0[.0000000000], 0,0[.]0000000000 or alike.

If I can make a suggestion, I would borrow regex syntax here: 0,0[.]0* where * pretty much means any number of digits including none.