Give more flexibility to purchaser_lines.

[voxik]

This avoids overlapped text when purchase address is extremely long and therefore provides more options to format the address.

Before:

After:

Actually, I'd be even happier if the purchaser_name could contain the "John Doe, Nemocnice Nové Město na Moravě, příspěvková organizace" probably broken to multiple lines. But that would need more text flowing. I tried but failed :/

BTW I have not tried to execute the test suite, so I'm sorry if something gets broken ;)

[voxik]

And of course, I have adjusted just the "purchaser", maybe the "provider" would deserve the same treatment. But .... :stuck_out_tongue_winking_eye:

[strzibny]

Thanks for the PR, I'll check. Time to setup automated tests I think:)

[strzibny]

It looks good, I''ll update the provider and regenerate the examples.