At $dayjob I recently came across the string “f├╝r” and was wondering what kind of Mojibake that was.
From context it was obvious that it should be “für”, i.e. the Umlaut aka “Latin Small Letter U with Diaeresis”
Turns out the answer is most likely: UTF-8 passed through a CP437 (orginal IBM-PC character set), CP850
(Latin-1), or CP852 (Latin-2) to UTF-8 decoder. ‘ü’ is U+00FC, which in UTF-8 is 0xC3 0xBC.
If we look those up in CP437, we get ├ (U+251C) for 0xC3 and ╝ (U+255D) for 0xBC.