Reduce empty address lines in "details" output + patch

[sciurius]

To reduce empty address lines in "details" output something similar to the attached patch could be considered.

For example, output before the patch:

Address
    HOME: 
        Main street 20

        1234 AB Blaricum
        , Netherlands

After the patch:

Address
    HOME: 
        Main street 20
        1234 AB Blaricum
        Netherlands

reduce_empty_address_lines.patch.txt