Added blank line between text and code block

guides/source/active_record_basics.md

@@ -607,6 +607,7 @@ ActiveRecord::RecordInvalid: Validation failed: Name can't be blank
 ```
 
 In the example below, the create method returns an ActiveRecord object, even if it is invalid, which can then be checked for errors.
+
 ```irb
 irb> user = User.create
 => #<User:0x000000013e8b5008 id: nil, name: nil>