Testing the Japanese version on my local machine…

Testing the Japanese version on my local machine and the automatic update from Beta2 to RC1 works fine except:

1. $wp_local_package in wp-includes/version.php is removed after the update.
2. Translations is not updated.

Step to reproduce:
1. Install WordPress 3.7 betaBeta A pre-release of software that is given out to a large group of users to trial under real conditions. Beta versions have gone through alpha testing in-house and are generally fairly close in look, feel and function to the final product; however, design changes often occur as part of the process. 2 Japanese version on your local machine.
2. After a while it is automatically updated to RC1.
3. Look into wp-includes/version.php, you will find wp_local_package is gone.
4. Look into wp-content/languages/ja.po and you will find “PO-Revision-Date: 2013-10-11 19:25:37+0000\n”, though the ja.po file of RC1 says “PO-Revision-Date: 2013-10-18 13:03:34+0000\n”

Does it happen because the all files are still in trunk?

#3-7