vim: Import v9.1.1291

* runtime(filetype): make shell filetype detection more robust
* 9.1.1291: too many strlen() calls in buffer.c
* runtime(keymaps): include 2 Brazilian Keymaps
* runtime(vim): Update-base-syntax, match full :*grep, :make, :sort and :filter commands
* 9.1.1290: tests: missing cleanup in test_filetype.vim

Author: github-actions[bot]

gitlog.txt

@@ -1 +1 @@
-* [9.1.1289](https://github.com/vim/vim/commit/96a0b2a6d5107580398435e263bd529d4ba3df49): tests: no test for matchparen plugin with WinScrolled event\n* [runtime(remind): include remind.vim ftplugin](https://github.com/vim/vim/commit/f9f53f5a8f4c7b3da548914a4552a0c0c572364a)
+* [runtime(filetype): make shell filetype detection more robust](https://github.com/vim/vim/commit/5c84d12df104e976e8f56c43f9f975e54d9fd779)\n* [9.1.1291](https://github.com/vim/vim/commit/ec032de6465f159bd57c22d464e0f4815f3aefc7): too many strlen() calls in buffer.c\n* [runtime(keymaps): include 2 Brazilian Keymaps](https://github.com/vim/vim/commit/06a41ad084109ae67b949276f16e388fd4d9350a)\n* [runtime(vim): Update-base-syntax, match full :\*grep, :make, :sort and :filter commands](https://github.com/vim/vim/commit/9b171bdfd6b4c92a43c9690001fb2c8e09cf6a0c)\n* [9.1.1290](https://github.com/vim/vim/commit/b0e19f9e1b43328158784ad2429880e0370b5e7b): tests: missing cleanup in test\_filetype.vim