Hi,

This component is used mostly to mask numbers. So, in this cases for me it only makes sense to use spacing when you want to separate number group (for exemple: 12 000), and you can define this in the widget properties.

In my case I used the mask pattern: [a{*}]( [a{*}]){0,55}   
I used this pattern for name, which will restrict only words, followed by just 1 space between words. The {0, 55} represents the maxchar of the input.