alt Hacker NewsThat's in the standard. https://www.unicode.org/reports/tr21/tr21-5.html
[SpecialCasing] Contains additional case mappings that map to more than one character, such as "ß" to "SS".
That's in the standard. https://www.unicode.org/reports/tr21/tr21-5.html
[SpecialCasing] Contains additional case mappings that map to more than one character, such as "ß" to "SS".
5.1 adds uppercase ẞ which can fold to either ss or lowercase ß depending on the chosen algorithm.