I have attempted to follow the instructions in README-hacking to update
tp/Texinfo/XS/ppport.h:
Update ppport.h in tp/Texinfo/XS:
perl -MDevel::PPPort -e'Devel::PPPort::WriteFile'
However, this downgraded the version of the file.
I tried to update the version of Devel::PPPort on my system (with some
command like "sudo cpan Devel::PPPort") which was better, but it still
doesn't get to the current version, which is 3.71, while Devel::PPPort
downgrades it to 3.68.
Devel::PPPort at CPAN seems to be at 3.68:
https://metacpan.org/pod/Devel::PPPort
I don't know how to get version 3.71 or a newer version if there is one.
I will leave it at 3.68.
