Update library/os.po

Co-authored-by: W. H. Wang <mattwang44@gmail.com>

Author: Super1115

library/os.po

@@ -217,8 +217,8 @@ msgid ""
 "On Unix, :func:`os.device_encoding` returns ``'utf-8'`` rather than the "
 "device encoding."
 msgstr ""
-"在Unix中, :func:`os.device_encoding` 回傳 ``'utf-8'`` 而非 "
-"裝置編碼"
+"在 Unix 中，:func:`os.device_encoding` 回傳 ``'utf-8'`` 而非"
+"裝置編碼。"
 
 #: ../../library/os.rst:127
 msgid ""