Implement Fallbacks#inspect and Fallbacks#empty?

lib/i18n/locale/fallbacks.rb

@@ -79,6 +79,14 @@ def map(*args, &block)
         end
       end
 
+      def empty?
+        @map.empty? && @defaults.empty?
+      end
+
+      def inspect
+       "#<#{self.class.name} @map=#{@map.inspect} @defaults=#{@defaults.inspect}>"
+      end
+
       protected
 
       def compute(tags, include_defaults = true, exclude = [])

test/locale/fallbacks_test.rb

@@ -170,4 +170,15 @@ def setup
     result = @fallbacks.map { |key, value| [key, value] }
     assert_equal([[:"de-AT", [:"de-DE"]]], result)
   end
+
+  test "empty? is compatible with Hash#empty?" do
+    refute_predicate(@fallbacks, :empty?)
+    refute_predicate(Fallbacks.new(:'en-US'), :empty?)
+    refute_predicate(Fallbacks.new(:"de-AT" => :"de-DE"), :empty?)
+    assert_predicate(Fallbacks.new, :empty?)
+  end
+
+  test "#inspect" do
+    assert_equal('#<I18n::Locale::Fallbacks @map={:"de-AT"=>[:"de-DE"]} @defaults=[:"en-US", :en]>', @fallbacks.inspect)
+  end
 end