"split -l ..." sometimes splits up a line

[rschupp]

Trying to split the attached MANIFEST.txt with

split -l 50 MANIFEST.txt

Check the last line of the generated file xbj and the first lineof xbk: the original line

cpan/Pod-Perldoc/lib/Pod/Perldoc/GetOptsOO.pm

has been split over the two files (after cpan/).

Platform is Linux x86_64 running Debian trixie with rustc 1.85.0, split built from main (8ec5fe1).

[rschupp]

Note that xbj ends in cpan/ without a trailing newline, so cat x?? is still equal to the contents of MANIFEST.txt.
FWIW, I tried with other numbers than 50: one line is split for 49, 50, 52, but 48 and 51 are OK.