It looks like you could have nmap format its output in a way that would much
easier to process (multiline patterns are a pain):
https://nmap.org/book/output-formats-grepable-output.html
- [Trisquel-users] Removing unwanted carriage returns amenex
- Re: [Trisquel-users] Removing unwanted carriage returns vas1980i
- Re: [Trisquel-users] Removing unwanted carriage returns amenex
- [Trisquel-users] Re : Removing unwanted carriage returns lcerf
- Re: [Trisquel-users] Removing unwanted carriage returns amenex
- Re: [Trisquel-users] Removing unwanted carriage returns amenex
- Re: [Trisquel-users] Removing unwanted carriage returns amenex
