[skip ci] Update .po files

Author: Autobuild bot on TravisCI

using/cmdline.po

@@ -5,6 +5,7 @@
 # 
 # Translators:
 # tomo, 2019
+# Takanori Suzuki <takanori@takanory.net>, 2021
 # 
 #, fuzzy
 msgid ""
@@ -13,7 +14,7 @@ msgstr ""
 "Report-Msgid-Bugs-To: \n"
 "POT-Creation-Date: 2021-01-01 16:02+0000\n"
 "PO-Revision-Date: 2019-09-01 02:44+0000\n"
-"Last-Translator: tomo, 2019\n"
+"Last-Translator: Takanori Suzuki <takanori@takanory.net>, 2021\n"
 "Language-Team: Japanese (https://www.transifex.com/python-doc/teams/5390/ja/)\n"
 "MIME-Version: 1.0\n"
 "Content-Type: text/plain; charset=UTF-8\n"
@@ -1152,15 +1153,15 @@ msgstr ""
 
 #: ../../using/cmdline.rst:818
 msgid "``C.UTF-8``"
-msgstr ""
+msgstr "``C.UTF-8``"
 
 #: ../../using/cmdline.rst:819
 msgid "``C.utf8``"
-msgstr ""
+msgstr "``C.utf8``"
 
 #: ../../using/cmdline.rst:820
 msgid "``UTF-8``"
-msgstr ""
+msgstr "``UTF-8``"
 
 #: ../../using/cmdline.rst:822
 msgid ""
@@ -1208,7 +1209,7 @@ msgstr ""
 
 #: ../../using/cmdline.rst:852
 msgid "See :pep:`538` for more details."
-msgstr ""
+msgstr "より詳しくは :pep:`538` を参照をしてください。"
 
 #: ../../using/cmdline.rst:858
 msgid ""
@@ -1308,7 +1309,7 @@ msgstr ""
 
 #: ../../using/cmdline.rst:911
 msgid "See :pep:`540` for more details."
-msgstr ""
+msgstr "より詳しくは :pep:`540` を参照してください。"
 
 #: ../../using/cmdline.rst:916
 msgid "Debug-mode variables"