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@@ -1,5 +1,7 @@
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 *SVN*
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+* Ruby 1.9 compatibility.  #1689, #10466, #10468 [Cheah Chu Yeow, Jeremy Kemper]
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+
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 * TimeZone#to_s uses UTC rather than GMT.  #1689 [Cheah Chu Yeow]
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 * Refactor of Hash#symbolize_keys! to use Hash#replace.  Closes #10420 [ReinH]

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@@ -461,11 +461,6 @@ end
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 class Class
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   def const_missing(const_name)
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-    # Bypass entire lookup process if we can get the constant from Object.
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-    # This is useful for Ruby 1.9 where Module#const_defined? looks up the
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-    # ancestors in the chain for the constant.
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-    return ::Object.const_get(const_name) if ::Object.const_defined?(const_name)
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-
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     if [Object, Kernel].include?(self) || parent == self
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       super
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     else

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@@ -64,7 +64,7 @@ module ActiveSupport
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     alias :until :ago
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     def inspect #:nodoc:
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-      consolidated = parts.inject(Hash.new(0)) { |h,part| h[part.first] += part.last; h }
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+      consolidated = parts.inject(::Hash.new(0)) { |h,part| h[part.first] += part.last; h }
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       [:years, :months, :days, :minutes, :seconds].map do |length|
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         n = consolidated[length]
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         "#{n} #{n == 1 ? length.to_s.singularize : length.to_s}" if n.nonzero?