names=FIELD_SEPARATOR,FS
visibility=public
kind=added

--- $FS              -> String | nil
--- $FIELD_SEPARATOR -> String | nil

[[m:$;]] の別名

  require "English"

  str = "hoge,fuga,ugo,bar,foo"
  p str.split #=> ["hoge,fuga,ugo,bar,foo"]
  $FIELD_SEPARATOR = ","
  p str.split #=> ["hoge", "fuga", "ugo", "bar", "foo"]

