Man doesn't handle man pages that don't end with newlines very well it
prints some extra garbage.

This should probably be reported to the maintainer of man but I don't know
who that is right now.

So if you have a man page which ends like:
.BR ppd_free "(3), " ppd_emit "(3)"
When you try to display the man page you get something like:
ppd_emit(3).pl520u+1

However if you put the end of the line in then and make it look like:
.BR ppd_free "(3), " ppd_emit "(3)"\n

Then it works fine.