Properly inline DottyPredef.locally

Author: nicolasstucki

library/src/dotty/DottyPredef.scala

@@ -18,7 +18,7 @@ object DottyPredef {
 
   inline final def implicitly[T](implicit ev: T): T = ev
 
-  inline def locally[T](body: => T): T = body
+  inline def locally[T](inline body: T): T = body
 
   /**
    * Retrieve the single value of a type with a unique inhabitant.