vim: Import v8.2.1975

* 8.2.1975: Win32: memory leak when encoding conversion fails
* 8.2.1974: Vim9: test for has('gui_running') fails with VIMDLL
* 8.2.1973: finding a patch number can be a bit slow
* 8.2.1972: crash when recreating nested fold
* 8.2.1971: memory leak when map() fails

gitlog.txt

@@ -1 +1 @@
-* [8.2.1970](https://github.com/vim/vim/commit/f883508e36c209d60388b944e04e22a3fcf603cf): it is easy to make mistakes when cleaning up swap files\n* [8.2.1969](https://github.com/vim/vim/commit/ea696852e7abcdebaf7f17a7f23dc90df1f5e2ed): Vim9: map() may change the list or dict item type\n* [8.2.1968](https://github.com/vim/vim/commit/8cebd43e9774d2624af43ee5b86939886f2ba490): Vim9: has() assumes a feature does not change dynamically
+* [8.2.1975](https://github.com/vim/vim/commit/bbf9f344afd08954163191ed678352fb554fc254): Win32: memory leak when encoding conversion fails\n* [8.2.1974](https://github.com/vim/vim/commit/29b281ba8ddf176ae34b22e6a9b8e0ddcbcce665): Vim9: test for has('gui\_running') fails with VIMDLL\n* [8.2.1973](https://github.com/vim/vim/commit/232f4612e2b0a6a205ae385740078f6b8af05e75): finding a patch number can be a bit slow\n* [8.2.1972](https://github.com/vim/vim/commit/5e1f22ff614821b8fc7294c9dd22765acd403aeb): crash when recreating nested fold\n* [8.2.1971](https://github.com/vim/vim/commit/c56936e2ba4fd219f56aab616fcb283132455697): memory leak when map() fails