add empty line after guard clause to ApplicationSystemTestCase

git-svn-id: http://svn.redmine.org/redmine/trunk@20144 e93f8b46-1217-0410-a6f0-8f06a7374b81

Author: marutosi

test/application_system_test_case.rb

@@ -80,6 +80,7 @@ def downloaded_file(filename='*')
       loop do
         files = downloaded_files(filename)
         break if files.present?
+
         sleep 0.2
       end
     end