substitution.rb in prawn-emoji-3.2.0

- old
+ new

@@ -5,10 +5,10 @@
 module Prawn
   module Emoji
     class Substitution
       extend Forwardable
 
-      FULL_SIZE_SPACE = '　'.freeze
+      FULL_SIZE_SPACE = '　'
       HALF_SIZE_SPACE = Prawn::Text::NBSP
 
       def_delegator :@document, :width_of
 
       def initialize(document)