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@@ -627,7 +627,7 @@ And now you must use instance of `Configuration` in your application.
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 ### Don't use a Singleton pattern
-Singleton is a [anti-pattern](https://en.wikipedia.org/wiki/Singleton_pattern).
+Singleton is an [anti-pattern](https://en.wikipedia.org/wiki/Singleton_pattern).
 
 **Bad:**