bin/image_voodoo in image_voodoo-0.8.9 vs bin/image_voodoo in image_voodoo-0.9.0

@@ -104,10 +104,10 @@
   o.on('--push', 'Save the current image to be popped later') do
     actions << ->(img) { img.tap { images << img } }
   end
 
   o.on('--pop', 'Revert back to the previous image') do
-    actions << ->() { images.pop || original_image }
+    actions << -> { images.pop || original_image }
   end
 
   o.on('-f', '--format', 'Print the image format') do
     actions << ->(img) { img.tap { img.format } }
   end