Upgrade to Rails 2.2.0

As a side benefit, fix an (non-user-visible) bug in display_s5().
Also fixed a bug where removing orphaned pages did not expire cached summary pages.

vendor/rails/activemodel/test/state_machine/machine_test.rb

@@ -0,0 +1,43 @@
+require File.expand_path(File.join(File.dirname(__FILE__), '..', 'test_helper'))
+
+class MachineTestSubject
+  include ActiveModel::StateMachine
+
+  state_machine do
+    state :open
+    state :closed
+  end
+
+  state_machine :initial => :foo do
+    event :shutdown do
+      transitions :from => :open, :to => :closed
+    end
+
+    event :timeout do
+      transitions :from => :open, :to => :closed
+    end
+  end
+
+  state_machine :extra, :initial => :bar do
+  end
+end
+
+class StateMachineMachineTest < ActiveModel::TestCase
+  test "allows reuse of existing machines" do
+    assert_equal 2, MachineTestSubject.state_machines.size
+  end
+
+  test "sets #initial_state from :initial option" do
+    assert_equal :bar, MachineTestSubject.state_machine(:extra).initial_state
+  end
+
+  test "accesses non-default state machine" do
+    assert_kind_of ActiveModel::StateMachine::Machine, MachineTestSubject.state_machine(:extra)
+  end
+
+  test "finds events for given state" do
+    events = MachineTestSubject.state_machine.events_for(:open)
+    assert events.include?(:shutdown)
+    assert events.include?(:timeout)
+  end
+end