vim: Import v8.2.4297

* 8.2.4297: Vim9: not all code covered by tests
* 8.2.4296: Vim9: not all code covered by tests
* Update runtime files; use compiled functions
* Update runtime files.
* 8.2.4295: Vim9: concatenating two lists may result in wrong type
* 8.2.4294: MS-Windows: #ifdefs for Cygwin are too complicated

Author: chrisbra

gitlog.txt

@@ -1 +1 @@
-* [8.2.4293](https://github.com/vim/vim/commit/7676c158798a7c90f500cab2c12af0d47bad6026): Vim9: when copying a list it gets type list\<any>\n* [8.2.4292](https://github.com/vim/vim/commit/02a977ea5ee733412011a7f259a4efa0ffc95f1a): test fails\n* [8.2.4291](https://github.com/vim/vim/commit/5658ca343f49a770ec068a858f52547ce822afa1): error number used twice\n* [8.2.4290](https://github.com/vim/vim/commit/a8ec4916caadd0a5113b7d41fa81d6d2c807260f): MS-Windows: using type casts for timer IDs\n* [8.2.4289](https://github.com/vim/vim/commit/5411910c77cba85212963a2fb71d8c71f8a5d203): warnings reported by MSVC\n* [8.2.4288](https://github.com/vim/vim/commit/6e1d31e9e3ca42cb883abca198f011dc6f4ceb14): preprocessor indents are inconsistent\n* [8.2.4287](https://github.com/vim/vim/commit/2d3ac2e03093c4b0ae5d18c5f2f51ae0c2a9ec72): cannot assign empty list with type to variable with list type
+* [8.2.4297](https://github.com/vim/vim/commit/21ebb0899ecf9049c3e1c9cbc2e06fd8e2a99e06): Vim9: not all code covered by tests\n* [8.2.4296](https://github.com/vim/vim/commit/83d0cec95697c244c8096c78aa806469302a8e19): Vim9: not all code covered by tests\n* [Update runtime files; use compiled functions](https://github.com/vim/vim/commit/3e79c97c18c50f97797ab13ed81c4011eba9aba0)\n* [Update runtime files.](https://github.com/vim/vim/commit/a2baa73d1d33014adea0fd9567949089ca21a782)\n* [8.2.4295](https://github.com/vim/vim/commit/46950b225fab2e10245a04952b2c238e0362e1b7): Vim9: concatenating two lists may result in wrong type\n* [8.2.4294](https://github.com/vim/vim/commit/972db232795874c58b9fdf23e43f53885a378eae): MS-Windows: #ifdefs for Cygwin are too complicated