vim: Import v9.1.1623

* runtime(doc): allow more C99 features
* runtime(python): Also sync syntax at 'async def'

Author: github-actions[bot]

gitlog.txt

@@ -1 +1 @@
-* [runtime(doc): update :call with a range and remove space](https://github.com/vim/vim/commit/6b9cf3139a666c97772bb895886ecf04b264dcc1)\n* [runtime(doc): Fix 2 minor issues after 32d6bd6df](https://github.com/vim/vim/commit/8b183450ad4ceda1afb7ec0c86ac3f6d41a4244e)\n* [runtime(python): Highlight f-string replacement fields in Python](https://github.com/vim/vim/commit/a94a0555d911da0d3bcd7e91d76c8e8ef03d9b0e)\n* [runtime(python): Highlight classes as structures](https://github.com/vim/vim/commit/48b7eb1ceb16527640ce5853d876c432d7342532)\n* [CI: Add Lychee CI test to check for broken links](https://github.com/vim/vim/commit/e32465190c22af35834c81f6e5f123533389e7b5)\n* [runtime(doc): remove dead links](https://github.com/vim/vim/commit/32d6bd6df2d0e13a8283ba80d506310ba5ba8b61)\n* [9.1.1623](https://github.com/vim/vim/commit/8f9de4991e84dfdc9bcc9dad0eaa2b3544ef963e): Buffer menu does not handle unicode names correctly\n* [9.1.1622](https://github.com/vim/vim/commit/cda0d17f5937c9e09d6821da64e57d589fd3c404): Patch v9.1.1432 causes performance regressions\n* [9.1.1621](https://github.com/vim/vim/commit/da9c9668931e5c8ee4dc0e430898ad2d80f56862): flicker in popup menu during cmdline autocompletion\n* [9.1.1620](https://github.com/vim/vim/commit/4fca92faa2079d4bb1ece3bd31a4278881a7dacb): filetype: composer.lock and symfony.lock files not recognized\n* [9.1.1619](https://github.com/vim/vim/commit/b362995430ee809f866d74930897bc158a4eb4ca): Incorrect E535 error message\n* [runtime(doc): Fix style and typos in builtin.txt and usr\_41.txt](https://github.com/vim/vim/commit/fc3c204bbe48d34bded70d2b190c3b1e1f9f89b7)\n* [9.1.1618](https://github.com/vim/vim/commit/8e2a2291892935f28645cbe550ef2856bab1ee4e): completion: incorrect selected index returned from complete\_info()\n* [9.1.1617](https://github.com/vim/vim/commit/1434ea03b1e47ec49dfcba207e59006b32091d3b): Vim9: some error messages can be improved\n* [runtime(doc): Tweak documentation style](https://github.com/vim/vim/commit/57eb1d496bd2337847da9c290b7e1e15177da144)
+* [runtime(doc): allow more C99 features](https://github.com/vim/vim/commit/d1833d2827659d6176ac0607779fda3ebfee8ddc)\n* [runtime(python): Also sync syntax at 'async def'](https://github.com/vim/vim/commit/dba9eb46e622efe39331b75d0c57c5d8b61b526f)