NS lookup failed error generates invalid JSON

Some domains like glbaa.barclays.com. are so broken that genreport prints error "NS lookup failed". This is fine in command line but respective JSON output is invalid and causes problems on dnsflagday.net.

The raw output currently is:

{
"status": "ok",
"errors": [ "glbaa.barclays.com.: NS lookup failed
" ],
"report": "https://ednscomp.isc.org/ednscomp/97a139de7c"
}

Problem is caused by newline after "NS lookup failed". Could you please remove it?

Thank you.