The attached patch replaces 'the the' to 'the'. Patch come from FreeBSD r240518 (firstname.lastname@example.org).
Checked into the trunk and 4.3 branch.
(BTW, this should've been a tcpdump bug rather than a libpcap bug.)
Administrators of the "libpcap" SourceForge project have superseded this tracker item (formerly artifact 3574879, now bug 177) with issue 180 of the "libpcap" GitHub project.