Conditional newline on label fields

[cnf]

Is your feature request related to a problem? Please describe. When you enclose variables in labels with an extra {} they will stay blank if that field has no value. But it will still create an empty line. So if the next field does have data, you have a blank line doing nothing on your label

Describe the solution you'd like When output is suppressed with {example {comment}} also suppress the newline.

Additional context I guess it can be part of #74

Thanks!