Fix documentation of number_to_currency helper

Now users have to explicit mark the unit as safe if they trust it.

Closes #13161

1 files changed, 1 insertions, 1 deletions

diff --git a/actionpack/test/template/number_helper_i18n_test.rb b/actionpack/test/template/number_helper_i18n_test.rb
index 4710cbf6bc..5a3250e949 100644
--- a/actionpack/test/template/number_helper_i18n_test.rb
+++ b/actionpack/test/template/number_helper_i18n_test.rb
@@ -53,7 +53,7 @@ class NumberHelperTest < ActionView::TestCase
       assert_equal("-$10.00", number_to_currency(-10))
     end
   end
-  
+
   def test_number_to_currency_without_currency_negative_format
     clean_i18n do
       I18n.backend.store_translations 'ts', :number => { :currency => { :format => { :unit => '@', :format => '%n %u' } } }