Fix formatting in Korean translation

The extra code block made `mdbook test` fail.

Author: mgeisler

po/ko.po

@@ -8273,12 +8273,10 @@ msgid ""
 "    Self: Sized`"
 msgstr ""
 "`Iterator`는 아래와 같이 구현됩니다.\n"
-"```\n"
-"fn collect<B>(self) -> B\n"
+"`fn collect<B>(self) -> B\n"
 "where\n"
 "    B: FromIterator<Self::Item>,\n"
-"    Self: Sized\n"
-"```"
+"    Self: Sized`"
 
 #: src/traits/from-iterator.md:23
 msgid ""