in reply to The "%" operator and its documentation.
https://perl5.git.perl.org/perl5.git/blob/HEAD:/pp.c#l1537
https://perl5.git.perl.org/perl5.git/blob/HEAD:/t/opbasic/arith.t#l76
https://perl5.git.perl.org/perl5.git/blob/HEAD:/t/op/64bitint.t