Update library/os.po

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

Author: Super1115

library/os.po

@@ -200,8 +200,8 @@ msgid ""
 ":func:`locale.getpreferredencoding` returns ``'utf-8'`` (the *do_setlocale* "
 "argument has no effect)."
 msgstr ""
-":func:`locale.getpreferredencoding` 回傳 ``'utf-8'`` (*do_setlocale* "
-"引數並無任何效果)."
+":func:`locale.getpreferredencoding` 回傳 ``'utf-8'``\\ （*do_setlocale* "
+"引數並無任何效果）。"
 
 #: ../../library/os.rst:119
 msgid ""