Docs: clarify the un-deletion example

The integer id (153) was a little confusing.

README.md

@@ -516,11 +516,12 @@ Note `version_at` gives you the object, not a version, so you don't need to call
 Undeleting is just as simple:
 
 ```ruby
-widget = Widget.find 42
+widget = Widget.find(42)
 widget.destroy
 # Time passes....
-widget = PaperTrail::Version.find(153).reify  # the widget as it was before destruction
-widget.save                                   # the widget lives!
+versions = widget.versions    # versions ordered by versions.created_at, ascending
+widget = versions.last.reify  # the widget as it was before destruction
+widget.save                   # the widget lives!
 ```
 
 You could even use PaperTrail to implement an undo system, [Ryan Bates has!][3]

spec/models/widget_spec.rb

@@ -155,6 +155,24 @@ describe Widget, type: :model do
           versions_for_widget = PaperTrail::Version.with_item_keys("Widget", widget.id)
           assert_equal 2, versions_for_widget.length
         end
+
+        it "can have multiple destruction records" do
+          versions = lambda { |widget|
+            # Workaround for AR 3. When we drop AR 3 support, we can simply use
+            # the `widget.versions` association, instead of `with_item_keys`.
+            PaperTrail::Version.with_item_keys("Widget", widget.id)
+          }
+          widget = Widget.create
+          assert_equal 1, widget.versions.length
+          widget.destroy
+          assert_equal 2, versions.call(widget).length
+          widget = widget.version.reify
+          widget.save
+          assert_equal 3, versions.call(widget).length
+          widget.destroy
+          assert_equal 4, versions.call(widget).length
+          assert_equal 2, versions.call(widget).where(event: "destroy").length
+        end
       end
 
       describe "#paper_trail.originator" do