Cache other required options and fix typo

lib/simple_form/i18n_cache.rb

@@ -1,12 +1,12 @@
 module SimpleForm
-  # A lot of configuration valeus are retrived from I18n,
+  # A lot of configuration values are retrived from I18n,
   # like boolean collection, required string. This module provides
-  # caching facility to speed up form construciton.
+  # caching facility to speed up form construction.
   module I18nCache
     def i18n_cache(key)
       get_i18n_cache(key)[I18n.locale] ||= yield.freeze
     end
-    
+
     def get_i18n_cache(key)
       instance_variable_get(:"@#{key}") || reset_i18n_cache(key)
     end
@@ -15,4 +15,4 @@ module SimpleForm
       instance_variable_set(:"@#{key}", {})
     end
   end
-end
+end

lib/simple_form/label.rb

@@ -15,11 +15,15 @@ module SimpleForm
       end
 
       def translate_required_text
-        I18n.t(:"simple_form.required.text", :default => 'required')
+        i18n_cache :translate_required_text do
+          I18n.t(:"simple_form.required.text", :default => 'required')
+        end
       end
 
       def translate_required_mark
-        I18n.t(:"simple_form.required.mark", :default => '*')
+        i18n_cache :translate_required_mark do
+          I18n.t(:"simple_form.required.mark", :default => '*')
+        end
       end
     end
 

test/label_test.rb

@@ -3,7 +3,9 @@ require 'test_helper'
 class LabelTest < ActionView::TestCase
 
   setup do
-    SimpleForm::FormBuilder.reset_i18n_cache :translate_required_string
+    [:string, :text, :mark].each do |cache|
+      SimpleForm::FormBuilder.reset_i18n_cache :"translate_required_#{cache}"
+    end
   end
 
   test 'input should generate a label with the text field' do