[issue34723] lower() on Turkish letter "İ" returns a 2-chars-long string

[Şahin Kureta]

Şahin Kureta <skureta at gmail.com> added the comment:

I know it is not finalized and released yet but are you going to implement Version 14.0.0 of the Unicode Standard? It finally solves the issue of Turkish lower/upper case 'I' and 'i'.

[Here is the document](https://www.unicode.org/Public/14.0.0/ucd/NamesList-14.0.0d1.txt)

> 0049	LATIN CAPITAL LETTER I
	* Turkish and Azerbaijani use 0131 for lowercase

> 0069	LATIN SMALL LETTER I
	* Turkish and Azerbaijani use 0130 for uppercase

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nosy: +Şahin Kureta

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<https://bugs.python.org/issue34723>
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