Fix a typo

Author: neshkeev

docs/docs/reference/overview.md

@@ -50,8 +50,7 @@ These constructs replace existing constructs with the aim of making the language
 
 With the exception of early initializers and old-style vararg patterns, all superseded constructs continue to be available in Scala 3.0. The plan is to deprecate and phase them out later.
 
-Value classes (superseded by opaque type aliases) ar
-e a special case. There are currently no deprecation plans for value classes, since we might want to bring them back in a more general form if they are supported natively by the JVM as is planned by project Valhalla.
+Value classes (superseded by opaque type aliases) are a special case. There are currently no deprecation plans for value classes, since we might want to bring them back in a more general form if they are supported natively by the JVM as is planned by project Valhalla.
 
 ## Restrictions