update

AnghelLeonard · AnghelLeonard · commit 4a283f4e807a · 2019-08-23T21:28:44.000+03:00
diff --git a/Chapter_13/P271_OptionalInMethodArgs/src/modern/challenge/Book.java b/Chapter_13/P271_OptionalInMethodArgs/src/modern/challenge/Book.java
@@ -11,7 +11,7 @@ public void renderBook(Format format, Optional<Renderer> renderer, Optional<Stri
         Objects.requireNonNull(format, "Format cannot be null");
 
         Renderer bookRenderer = renderer.orElseThrow(
-                () -> new IllegalArgumentException("Renderer cannot be missing")
+                () -> new IllegalArgumentException("Renderer cannot be empty")
         );
 
         String bookSize = size.orElseGet(() -> "125 x 200");
