Update sample to use cleaner syntax

samples/layouts.rb

@@ -1,5 +1,6 @@
 # encoding: utf-8
 require 'squib'
+require 'pp'
 
 Squib::Deck.new(layout: 'custom-layout.yml') do
   background color: :white
@@ -29,7 +30,7 @@ Squib::Deck.new(layout: 'custom-layout.yml') do
 
   # For debugging purposes, you can always print out the loaded layout
   # require 'pp'
-  #pp @layout
+  # pp layout
 
   save_png prefix: 'layout_'
 end