[skip ci] Update .po files

Autobuild bot on TravisCI · Autobuild bot on TravisCI · commit 698bff58d246 · 2018-07-27T13:57:18.000+09:00
diff --git a/tutorial/classes.po b/tutorial/classes.po
@@ -9,8 +9,8 @@ msgid ""
 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: 2018-06-21 15:16+0000\n"
+"POT-Creation-Date: 2018-07-26 13:58+0900\n"
+"PO-Revision-Date: 2018-07-26 05:09+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"
@@ -433,15 +433,15 @@ msgstr "もう答は想像できているかもしれませんね。メソッド
 #: ../../tutorial/classes.rst:330
 msgid ""
 "If you still don't understand how methods work, a look at the implementation"
-" can perhaps clarify matters.  When an instance attribute is referenced that"
-" isn't a data attribute, its class is searched.  If the name denotes a valid"
-" class attribute that is a function object, a method object is created by "
+" can perhaps clarify matters.  When a non-data attribute of an instance is "
+"referenced, the instance's class is searched.  If the name denotes a valid "
+"class attribute that is a function object, a method object is created by "
 "packing (pointers to) the instance object and the function object just found"
 " together in an abstract object: this is the method object.  When the method"
 " object is called with an argument list, a new argument list is constructed "
 "from the instance object and the argument list, and the function object is "
 "called with this new argument list."
-msgstr "もしまだメソッドの動作を理解できなければ、一度実装を見てみると事情がよく分かるかもしれません。データ属性ではないインスタンス属性が参照された時は、そのクラスが検索されます。その名前が有効なクラス属性を表している関数オブジェクトなら、インスタンスオブジェクトと見つかった関数オブジェクト (へのポインタ) を抽象オブジェクト、すなわちメソッドオブジェクトにパックして作成します。メソッドオブジェクトが引数リストと共に呼び出されるとき、インスタンスオブジェクトと渡された引数リストから新しい引数リストを作成して、元の関数オブジェクトを新しい引数リストで呼び出します。"
+msgstr ""
 
 #: ../../tutorial/classes.rst:344
 msgid "Class and Instance Variables"
