Take into account precision option

[kosmasgiannis]

Hi there,

it seems that the precision option is not taken into account. I tried different values but the result was the same.
This pull request fixes the problem. Sprintf module is used for that purpose.

I hope you release it.

Thanks,
Giannis Kosmas

[adriano-di-giovanni]

Thanks, @kosmasgiannis

I fixed the issue without adding a new dependency.

Thanks again,
Adriano

[kosmasgiannis]

@adriano-di-giovanni You are right, but I am afraid that this way it is not supported to round it to 0 decimal places. For example :

{ file: '/', prefixMultiplier: 'MB', precision: 0 }
[ { filesystem: '/dev/disk0s2',
    size: 499248.103424,
    used: 490356.23219199997,
    available: 8629.727232,
    capacity: 0.99,
    mount: '/' } ]

[adriano-di-giovanni]

Maybe I fixed this, too.

[kosmasgiannis]

Confirmed fixed.

Thanks!