Avoid using Integer#/, as it is redefined by the 'mathn' stdlib

actionpack/lib/action_view/helpers/date_helper.rb

@@ -129,7 +129,7 @@ def distance_of_time_in_words(from_time, to_time = 0, include_seconds_or_options
                 minutes_with_offset = distance_in_minutes
               end
               remainder                   = (minutes_with_offset % 525600)
-              distance_in_years           = (minutes_with_offset / 525600)
+              distance_in_years           = (minutes_with_offset.div 525600)
               if remainder < 131400
                 locale.t(:about_x_years,  :count => distance_in_years)
               elsif remainder < 394200

actionpack/test/template/date_helper_test.rb

@@ -19,6 +19,8 @@ def to_param
   end
 
   def assert_distance_of_time_in_words(from, to=nil)
+    Fixnum.send :private, :/  # test we avoid Integer#/ (redefined by mathn)
+
     to ||= from
 
     # 0..1 minute with :include_seconds => true
@@ -121,6 +123,9 @@ def assert_distance_of_time_in_words(from, to=nil)
     assert_equal "about 4 hours", distance_of_time_in_words(from + 4.hours, to)
     assert_equal "less than 20 seconds", distance_of_time_in_words(from + 19.seconds, to, :include_seconds => true)
     assert_equal "less than a minute", distance_of_time_in_words(from + 19.seconds, to, :include_seconds => false)
+
+  ensure
+    Fixnum.send :public, :/
   end
 
   def test_distance_in_words