Rubocop: Style/Alias enabled

.rubocop.yml

@@ -10,7 +10,7 @@ Style/AccessorMethodName:
 Style/Alias:
   Description: 'Use alias_method instead of alias.'
   StyleGuide: 'https://github.com/bbatsov/ruby-style-guide#alias-method'
-  Enabled: false
+  Enabled: true
 
 Style/AlignArray:
   Description: >-

app/models/wiki_page.rb

@@ -43,7 +43,7 @@ class WikiPage
     @attributes[:slug]
   end
 
-  alias :to_param :slug
+  alias_method :to_param, :slug
 
   # The formatted title of this page.
   def title