vim: Import v8.2.4827

* 8.2.4827: typo in variable name
* 8.2.4826: .cshtml files are not recognized
* 8.2.4825: can only get a list of mappings
* 8.2.4824: expression is evaluated multiple times
* 8.2.4823: concat more than 2 strings in :def function is inefficient

Author: chrisbra

gitlog.txt

@@ -1 +1 @@
-* [8.2.4822](https://github.com/vim/vim/commit/af59e34f1bf214ec6f2d0304c1c5b11ecda25a83): setting ufunc to NULL twice\n* [8.2.4821](https://github.com/vim/vim/commit/aac12daa61d9e84616771ec9242fd232f46786e6): crash when imported autoload script was deleted\n* [8.2.4820](https://github.com/vim/vim/commit/659c240cf769925ff432b88df8719e7ace4629b0): not simple programmatic way to find a specific mapping\n* [8.2.4819](https://github.com/vim/vim/commit/a4e3332650021921068ef12923b4501c5b9918cb): unmapping simplified keys also deletes other mapping\n* [8.2.4818](https://github.com/vim/vim/commit/ac92ab771952b2a9ee39ea6fa5e70e4c072942d5): no test for what 8.2.4806 fixes\n* [8.2.4817](https://github.com/vim/vim/commit/45684c6ec458c43e20db0b2f5f19ce000d34dbd5): Win32 GUI: modifiers are not always used\n* [8.2.4816](https://github.com/vim/vim/commit/490ac3fe98c737102c3f257bbe7c1797703116d9): still using older codecov app in some places of CI
+* [8.2.4827](https://github.com/vim/vim/commit/87f74106f96737e7b8ceaafe1a131aa718077de6): typo in variable name\n* [8.2.4826](https://github.com/vim/vim/commit/1f435dafff2452e0b55d1ca457ce7402e526e92a): .cshtml files are not recognized\n* [8.2.4825](https://github.com/vim/vim/commit/09661203ecefbee6a6f09438afcff1843e9dbfb4): can only get a list of mappings\n* [8.2.4824](https://github.com/vim/vim/commit/23d5770ef5e2f5c6d20d123303b81327045e5a1e): expression is evaluated multiple times\n* [8.2.4823](https://github.com/vim/vim/commit/372bcceeee8012ef3fb2f3dbc8132c3a33cb84fc): concat more than 2 strings in :def function is inefficient