Symbolize keys doesn't do what I expected when to_sym equivalent keys exist.

symbolized_hash_keys.rb

# Fascinating behavior of symbolize_keys usage. If you have two keys that 
# are `to_sym` equivalents, the non-symbol version is the winner,
# regardless of the order in the hash.
# For some reason I expected if a symbol key existed it would be
# the winner.

1.9.2p290 :002 > {"one" => 1, :one => 2}.symbolize_keys
 => {:one=>1} 
1.9.2p290 :001 > {:one => 1, "one" => 2}.symbolize_keys
 => {:one=>2}