[ci skip] Improve callback code example for 4.1 upgrade docs.

The previous code example for the new explicit block requirement when
setting callbacks was a little confusing. This commit makes the example
more obvious.

1 files changed, 4 insertions, 4 deletions

diff --git a/guides/source/upgrading_ruby_on_rails.md b/guides/source/upgrading_ruby_on_rails.md
index 03be99e8f0..1e752b449d 100644
--- a/guides/source/upgrading_ruby_on_rails.md
+++ b/guides/source/upgrading_ruby_on_rails.md
@@ -439,11 +439,11 @@ Rails 4.1 now expects an explicit block to be passed when calling
 `ActiveSupport::Callbacks` being largely rewritten for the 4.1 release.
 
 ```ruby
-# Rails 4.1
-set_callback :save, :around, ->(r, block) { stuff; result = block.call; stuff }
-
-# Rails 4.0
+# Previously in Rails 4.0
 set_callback :save, :around, ->(r, &block) { stuff; result = block.call; stuff }
+
+# Now in Rails 4.1
+set_callback :save, :around, ->(r, block) { stuff; result = block.call; stuff }
 ```
 
 Upgrading from Rails 3.2 to Rails 4.0