This is the revision history for $/ in <*:##NULL>

factoid_idsubjectcopulapredicateauthornamespace
9530 $/ is Line break when reading file. Use some slurping module instead. glitchmr
9529 $/ is Line break when reading file. glitchmr
3657 $/ is input record seperator - read about it in "perldoc perlvar" perlbot