clean up whitespace

app/models/preference.rb

@@ -1,7 +1,7 @@
 class Preference < ActiveRecord::Base
   belongs_to :user
   belongs_to :sms_context, :class_name => 'Context'
-    
+
   def self.due_styles
     { :due_in_n_days => 0, :due_on => 1}
   end

test/models/preference_test.rb

@@ -13,17 +13,17 @@ class PreferenceTest < ActiveSupport::TestCase
   def test_time_zone
     assert_equal 'London', @admin_user.preference.time_zone
   end
-  
+
   def test_show_project_on_todo_done
     assert @other_user.preference.show_project_on_todo_done
     assert !@admin_user.preference.show_project_on_todo_done
   end
-  
+
   def test_parse_date
     date = Time.new(2007, 05, 20).in_time_zone(@admin_user.preference.time_zone).at_midnight
     assert_equal date.to_s, @admin_user.preference.parse_date('20/5/2007').to_s
   end
-  
+
   def test_parse_date_returns_nil_if_string_is_empty
     assert_nil @admin_user.preference.parse_date('')
   end