Add a space between numbers and their units

[firasuke]

I think it's better to have some sort of separator (e.g. space) between numbers and their units.

[firasuke]

@djc thanks for merging this, I got a question though, shouldn't:

NumberPrefix::Standalone(number) => write!(f, "{:.0}B", number),

also be changed to:

NumberPrefix::Standalone(number) => write!(f, "{:.0} B", number),

I saw no change though when changing NumberPrefix::Standalone(number), perhaps because it's only changing the number and not the prefix? If so, why is there a B in there?

Thanks again!

[firasuke]

Also it seems that some tests need to be modified after this changed.

[djc]

Sorry, I clearly wasn't paying enough attention when I merged this. I reverted it in 20c5693, can you do another take to fix the CI issues?