[skip ci] Update .po files

Autobuild bot on TravisCI · Autobuild bot on TravisCI · commit 335254a738ed · 2019-04-28T16:20:21.000+09:00
diff --git a/reference/datamodel.po b/reference/datamodel.po
@@ -10,7 +10,7 @@ msgstr ""
 "Project-Id-Version: Python 2.7\n"
 "Report-Msgid-Bugs-To: \n"
 "POT-Creation-Date: 2019-01-01 15:21+0900\n"
-"PO-Revision-Date: 2019-01-16 23:13+0000\n"
+"PO-Revision-Date: 2019-04-27 22:00+0000\n"
 "Last-Translator: tomo\n"
 "Language-Team: Japanese (http://www.transifex.com/python-doc/python-27/language/ja/)\n"
 "MIME-Version: 1.0\n"
