lib/reveal-ck/markdown.rb in reveal-ck-3.3.0 vs lib/reveal-ck/markdown.rb in reveal-ck-3.3.1

@@ -1,12 +1,12 @@
 module RevealCK
   # This module defines how reveal-ck works with redcarpet to produce
   # slides from markdown.
   module Markdown
-    REVEALCK_SYMBOL_FOR_DIVIDER          = '<div>DIVIDER</div>'
-    REVEALCK_SYMBOL_FOR_VERTICAL_START   = '<div>VERTICAL_START</div>'
-    REVEALCK_SYMBOL_FOR_VERTICAL_END     = '<div>VERTICAL_END</div>'
-    REVEALCK_SYMBOL_FOR_EMOJI_UNDERSCORE = 'EU'
+    REVEALCK_SYMBOL_FOR_DIVIDER          = '<div>DIVIDER</div>'.freeze
+    REVEALCK_SYMBOL_FOR_VERTICAL_START   = '<div>VERTICAL_START</div>'.freeze
+    REVEALCK_SYMBOL_FOR_VERTICAL_END     = '<div>VERTICAL_END</div>'.freeze
+    REVEALCK_SYMBOL_FOR_EMOJI_UNDERSCORE = 'EU'.freeze
   end
 end
 
 require_relative 'markdown/slide_markdown'
 require_relative 'markdown/pre_processor'