Revert "fallback_string_to_date sets Date._parse comp arg to true, so…

… that strings with two-digit years, e.g. '1/1/09', are interpreted as modern years" [#2019 state:wontfix]

This reverts commit 55d1d12.

activerecord/CHANGELOG

@@ -1,7 +1,5 @@
 *Edge*
 
-* fallback_string_to_date sets Date._parse comp arg to true, so that strings with two-digit years, e.g. '1/1/09', are interpreted as modern years #2019 [Matt Ganderup]
-
 * quoted_date converts time-like objects to ActiveRecord::Base.default_timezone before serialization. This allows you to use Time.now in find conditions and have it correctly be serialized as the current time in UTC when default_timezone == :utc. #2946 [Geoff Buesing]
 
 * SQLite: drop support for 'dbfile' option in favor of 'database.'  #2363 [Paul Hinze, Jeremy Kemper]

activerecord/lib/active_record/connection_adapters/abstract/schema_definitions.rb

@@ -201,7 +201,7 @@ def fast_string_to_time(string)
           end
 
           def fallback_string_to_date(string)
-            new_date(*::Date._parse(string, true).values_at(:year, :mon, :mday))
+            new_date(*::Date._parse(string, false).values_at(:year, :mon, :mday))
           end
 
           def fallback_string_to_time(string)

activerecord/test/cases/date_time_test.rb

@@ -34,10 +34,4 @@ def test_assign_empty_time
     topic.bonus_time = ''
     assert_nil topic.bonus_time
   end
-
-  def test_two_digit_year
-    topic = Topic.new
-    topic.last_read = '1/1/09'
-    assert_equal Date.new(2009,1,1), topic.last_read
-  end
 end