vim: Import v8.2.4847

* 8.2.4847: crash when using uninitialized function pointer
* 8.2.4846: termcodes test fails
* 8.2.4845: duplicate code
* 8.2.4844: <C-S-I> is simplified to <S-Tab>

Author: chrisbra

gitlog.txt

@@ -1 +1 @@
-* [8.2.4843](https://github.com/vim/vim/commit/202b4bd3a452898cfe3ed72facfbf7cb8199fa4b): treating CTRL + ALT as AltGr is not backwards compatible\n* [8.2.4842](https://github.com/vim/vim/commit/211a5bb2353c66684f38527184a258921f95c9d9): expand("%:p") is not empty when there is no buffer name\n* [8.2.4841](https://github.com/vim/vim/commit/a96edb736d4274fc4aea460800780e06e1510812): empty string considered an error for expand()\n* [8.2.4840](https://github.com/vim/vim/commit/05c7f5d3d03440da6f69604f8c06c4e3d90d2a26): heredoc expression evaluated even when skipping\n* [8.2.4839](https://github.com/vim/vim/commit/0a748d91846a4c3422975acc0af78c806623c191): compiler warning for unused argument\n* [8.2.4838](https://github.com/vim/vim/commit/dca1d40cd0f2af0755519e7028378bd3c8fefd31): checking for absolute path is not trivial\n* [8.2.4837](https://github.com/vim/vim/commit/68a573ce2b996602a86b14d9b258ebb8c657604f): modifiers not simplified when timed out\n* [8.2.4836](https://github.com/vim/vim/commit/f6ced9863f931758a4cee0b6546e77d21150806d): Vim9: some lines not covered by tests
+* [8.2.4847](https://github.com/vim/vim/commit/a5d3590505fc3e1deea990560d472baa563abed7): crash when using uninitialized function pointer\n* [8.2.4846](https://github.com/vim/vim/commit/bad8a013c238595aa206690210eb1367fbc878f9): termcodes test fails\n* [8.2.4845](https://github.com/vim/vim/commit/590f365f91511c164253c5b5812d4d0fc4a238d6): duplicate code\n* [8.2.4844](https://github.com/vim/vim/commit/758a8d199988b5b25566b2820db60dc2c9de3e58): \<C-S-I> is simplified to \<S-Tab>