example/message_box.rb in ffi-tk-2010.08.23 vs example/message_box.rb in ffi-tk-2018.02.20

@@ -1,26 +1,29 @@
+# frozen_string_literal: true
 require 'ffi-tk'
 
 Tk.init
 
 label = Tk::Label.new(Tk.root, text: 'Press any key to open the dialog')
 label.pack
 
-Tk.root.bind('<Key>'){
+Tk.root.bind('<Key>') do
   answer = Tk.message_box(
     message: 'Really quit?',
     icon: :question,
     type: :yesno,
-    detail: 'Select "Yes" to make the application exit')
+    detail: 'Select "Yes" to make the application exit'
+  )
 
   case answer
   when :yes
     exit
   when :no
     Tk.message_box(
       message: 'I know you like this application!',
-      type: :ok)
+      type: :ok
+    )
     exit
   end
-}
+end
 
-Tk.mainloop
\ No newline at end of file
+Tk.mainloop