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By no means ment as Ruby-bashing, but an (imho) interesting observation:
one of the new core features of Ruby 2.0 is the following syntactic
sugar for generating lists of symbols:

  # Ruby 1.9:
  KEYS = [:foo, :bar, :baz]
  # Ruby 2.0:
  KEYS = %i[foo bar baz]

Funny, but I can't imagine this type of 'new language features' ever
ending up in Lua. Thank you for keeping my favourite language small and
tidy :)