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Mention Hash#key and other hash like interfaces.

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git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_1@20637 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
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knu 2008-12-11 11:21:42 +00:00
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@ -41,6 +41,9 @@ Incompatible (Trivial)
o Hash#to_s is equivalent to Hash#inspect
o Semantics for Hash#each and Hash#each_pair
o Hash#select
o Hash#key is the new name for #index which has been deprecated.
o Most of the changes in Hash apply to hash like interfaces such as
ENV and *DBM.
* Integer
o Integer(nil) raises TypeError
* Struct