From 3772304c7ab2df9a14bb99183407530b3ee86789 Mon Sep 17 00:00:00 2001
From: minusdavid <minusdavid@users.noreply.github.com>
Date: Wed, 21 Mar 2018 10:08:22 +1100
Subject: [PATCH] Update annotation.rb

---
 lib/iiif/presentation/annotation.rb | 1 +
 1 file changed, 1 insertion(+)

diff --git a/lib/iiif/presentation/annotation.rb b/lib/iiif/presentation/annotation.rb
index be464df..e218316 100644
--- a/lib/iiif/presentation/annotation.rb
+++ b/lib/iiif/presentation/annotation.rb
@@ -12,6 +12,7 @@ def required_keys
 
       def string_only_keys
         super + %w{ on }
+      end
 
       def abstract_resource_only_keys
         super + [ { key: 'resource', type: IIIF::Presentation::Resource } ]