Which methods does "puts" invoke?

< ^ > P N |<>|^_>< --- | ~ ...Help

Hi, if I redefine "to_s" or "inspect" methods in String class I still get the 
original output when doing:

  puts string

Which String@method is invoked when executing "puts"?

Thanks.

-- 
Iñaki Baz Castillo <ibc / aliax.net>