[skip ci] Update .po files

Autobuild bot on TravisCI · Autobuild bot on TravisCI · commit efacc4422e5b · 2018-06-22T13:35:58.000+09:00
diff --git a/tutorial/classes.po b/tutorial/classes.po
@@ -10,8 +10,8 @@ msgstr ""
 "Project-Id-Version: Python 2.7\n"
 "Report-Msgid-Bugs-To: \n"
 "POT-Creation-Date: 2018-01-21 01:52+0900\n"
-"PO-Revision-Date: 2018-06-15 02:02+0000\n"
-"Last-Translator: yuji takesue <taketakeyyy@gmail.com>\n"
+"PO-Revision-Date: 2018-06-21 15:16+0000\n"
+"Last-Translator: cocoatomo\n"
 "Language-Team: Japanese (http://www.transifex.com/python-doc/python-27/language/ja/)\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
