Revert "Merge pull request #14269 from arthurnn/expanded_key_array"

This reverts commit 475c96589ca65282e1a61350271c2f83f0d4044f, reversing
changes made to 705915ab5cf24430892107764b0050c07e1df583.

We decided that this is not worth busting everyone's cache as this
seems like a very unlikely problem. The problem only occurs when the
user is 1) not using a namespace, or 2) using the same namesapce for
different *kinds* of cache items. The recommended "fix" is to put
those cache items into their own namspace:

    id = 1
    Rails.cache.fetch(id, namespace: "user"){ User.find(id) }

    ids = [1]
    Rails.cache.fetch(ids, namespace: "users"){ User.find(ids) }

See the discussion on #14269 for details.

1 files changed, 1 insertions, 5 deletions

diff --git a/activesupport/test/caching_test.rb b/activesupport/test/caching_test.rb
index 64d8792dde..18923f61d1 100644
--- a/activesupport/test/caching_test.rb
+++ b/activesupport/test/caching_test.rb
@@ -257,10 +257,6 @@ module CacheStoreBehavior
     assert_nil @cache.fetch('foo') { 'baz' }
   end
 
-  def test_fetch_with_array_and_without
-    assert_not_equal @cache.fetch('foo') { 'barz' }, @cache.fetch(['foo']) { 'barr' }
-  end
-
   def test_should_read_and_write_hash
     assert @cache.write('foo', {:a => "b"})
     assert_equal({:a => "b"}, @cache.read('foo'))
@@ -353,7 +349,7 @@ module CacheStoreBehavior
 
   def test_array_as_cache_key
     @cache.write([:fu, "foo"], "bar")
-    assert_equal "bar", @cache.read("fu/foo/")
+    assert_equal "bar", @cache.read("fu/foo")
   end
 
   def test_hash_as_cache_key