vim: Import v9.1.1943

* runtime(doc): clarify the use of v:errormsg
* 9.1.1943: Memory leak with :breakadd expr
* runtime(lf): update syntax to support lf version r39

Author: github-actions[bot]

gitlog.txt

@@ -1 +1 @@
-* [runtime(vim): Update base syntax, match full :language command](https://github.com/vim/vim/commit/a4c43a6cf54b1916339641439b74f05499a4d9dd)\n* [9.1.1942](https://github.com/vim/vim/commit/e5c5378cd27a7a370af7868ec1e4d005b335b2f9): Vim9: Assignment to read-only registers @: and @% is allowed\n* [9.1.1941](https://github.com/vim/vim/commit/791478b30ae48f14e297b4f79dc49380ace99fac): tests: Test\_execute\_register() leaves swapfile behind\n* [9.1.1940](https://github.com/vim/vim/commit/aa133f8b3e20042186a8968d07f2465a24b4178c): clipboard registers "+" and "\*" synced without "autoselect"\n* [9.1.1939](https://github.com/vim/vim/commit/6e9694df10a32cfe3314c2487f4f0110c4d3de67): tests: test\_matchfuzzy() leaves swapfiles behind\n* [9.1.1938](https://github.com/vim/vim/commit/d4f9de889bb155052dabbe17ea4d552068824456): tests: excessive wait in Test\_matchfuzzy\_initialized\n* [9.1.1937](https://github.com/vim/vim/commit/a3925d783af75eff0ddc99f2ee8e4ca57b5909cd): tests: Test\_matchfuzzy\_initialized() fails\n* [9.1.1936](https://github.com/vim/vim/commit/b087c5452b4c12bfc9e7f6cecbee34aab64c92d8): filetype: Erlang lexical files are not recognized\n* [9.1.1935](https://github.com/vim/vim/commit/2b2580e61a853617173f907bd42e12a073cf2410): filetype: not all Erlang files are recognized\n* [runtime(doc): Update and clarify vim9.txt Section 3](https://github.com/vim/vim/commit/8b9b422111bd952f9a6a690d1be224b83d32582a)\n* [runtime(doc): Improve :help :catch command specification](https://github.com/vim/vim/commit/49f731d2431b2422b97f1e756c120453ce1ca984)\n* [runtime(netrw): fix undefined variable curwin in s:NetrwMenu()](https://github.com/vim/vim/commit/ab090993ad0d9134837a0299a5c7589c66ef4db5)
+* [runtime(doc): clarify the use of v:errormsg](https://github.com/vim/vim/commit/c3cfdefdeee3928671809a20f86ddc5d0fe4cc74)\n* [9.1.1943](https://github.com/vim/vim/commit/a474de64dfd853eb5d3bf04f8bbd6f7d16e10c82): Memory leak with :breakadd expr\n* [runtime(lf): update syntax to support lf version r39](https://github.com/vim/vim/commit/cce452f52d6b52b1f1b630206ba3b54a12465152)