Fix typo

docs/overview.md

@@ -63,12 +63,9 @@ Do with it as you please.
 
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-*attrs* also isn't a fully-fledged serialization library.
+*attrs* also is *not* a fully-fledged serialization library.
 While it comes with features like converters and validators, it is meant to be a kit for building classes that you would write yourself – but with less boilerplate.
 If you look for powerful-yet-unintrusive serialization and validation for your *attrs* classes, have a look at our sibling project [*cattrs*](https://catt.rs/) or our [third-party extensions](https://github.com/python-attrs/attrs/wiki/Extensions-to-attrs).
 
 This separation of creating classes and serializing them is a conscious design decision.
 We don't think that your business model and your serialization format should be coupled.
-
-This separation of creating classes and serializing them is a conscious design decision.
-We don't think that your business model and your serialization format should be coupled.