Use Kernel#Array to wrap the default value

Author: rafaelfranca

actionpack/lib/abstract_controller/translation.rb

@@ -23,12 +23,9 @@ def translate(key, **options)
         key = "#{path}.#{action_name}#{key}"
       end
 
-      if ActiveSupport::HtmlSafeTranslation.html_safe_translation_key?(key)
-        if options[:default]
-          options[:default] = [options[:default]] unless options[:default].is_a?(Array)
-          options[:default] = options[:default].map do |value|
-            value.is_a?(String) ? ERB::Util.html_escape(value) : value
-          end
+      if options[:default] && ActiveSupport::HtmlSafeTranslation.html_safe_translation_key?(key)
+        options[:default] = Array(options[:default]).map do |value|
+          value.is_a?(String) ? ERB::Util.html_escape(value) : value
         end
       end
 

activesupport/lib/active_support/html_safe_translation.rb

@@ -9,11 +9,14 @@ def translate(key, **options)
         html_safe_options = html_escape_translation_options(options)
 
         exception = false
+
         exception_handler = ->(*args) do
           exception = true
           I18n.exception_handler.call(*args)
         end
+
         translation = I18n.translate(key, **html_safe_options, exception_handler: exception_handler)
+
         if exception
           translation
         else