add space after comma to app/models/setting.rb

git-svn-id: http://svn.redmine.org/redmine/trunk@20130 e93f8b46-1217-0410-a6f0-8f06a7374b81

Author: marutosi

app/models/setting.rb

@@ -336,7 +336,7 @@ def force_utf8_strings(arg)
       end
     elsif arg.is_a?(Hash)
       arg = arg.dup
-      arg.each do |k,v|
+      arg.each do |k, v|
         arg[k] = force_utf8_strings(v)
       end
       arg