Wrong link syntax

Author: Nyholm

docs/httplug.md

@@ -46,7 +46,7 @@ You need to edit the `composer.json` of your package to add the virtual package.
 ...
 ```
 
-For extra convenience, you can use the (Discovery)[discovery.md] system to free the user of your package from having to instantiate the client. You should however always accept injecting the client instance to allow the user to configure the client as needed.
+For extra convenience, you can use the [Discovery](discovery.md) system to free the user of your package from having to instantiate the client. You should however always accept injecting the client instance to allow the user to configure the client as needed.
 
 Users of your package will have to select a concrete adapter in their project to make your package installable. Best point them to the (virtual package)[virtual-package.md] howto page.