vim: Import v9.1.1806

* 9.1.1806: Missing PROTO defines
* runtime(help): Update syntax, add vim9 example language
* runtime(vim): Update base syntax, improve line-continuation skip patterns
* runtime(doc): Fix :help complete() example
* 9.1.1805: Amiga: Missing build date in version string
* runtime(vim): Update base syntax, allow Vim9 :echo tail comments
* 9.1.1804: Wrong indentation of nested ifdefs in findfile.c
* 9.1.1803: Amiga: build errors
* runtime(java): Recognise _module_ import declarations
* 9.1.1802: 'nowrap' in a modeline may hide malicious code
* 9.1.1801: Vim9: misleading error when extending dictionary
* 9.1.1800: completion: strange behaviour with 'ac' completeopt=longest,preinsert
* 9.1.1799: completion: crash with autcompletion

Author: github-actions[bot]

gitlog.txt

@@ -1 +1 @@
-* [9.1.1798](https://github.com/vim/vim/commit/d9318acc0223bafd3ed5e7f8cdde26328bf200e7): Wrong display with 'sms' and long wrapped virt text at EOL\n* [runtime(doc): improve preinserted() doc](https://github.com/vim/vim/commit/4edaf8923335504c31810dc4c5213eaba84e7898)
+* [9.1.1806](https://github.com/vim/vim/commit/ca6a260ef1a4b4ae94bc71c17cbabf8f12bf0f8c): Missing PROTO defines\n* [runtime(help): Update syntax, add vim9 example language](https://github.com/vim/vim/commit/3a5613939809f456c29942a95f0b636c57749774)\n* [runtime(vim): Update base syntax, improve line-continuation skip patterns](https://github.com/vim/vim/commit/ae20d732ae691793297139f688936c602c674999)\n* [runtime(doc): Fix :help complete() example](https://github.com/vim/vim/commit/3de73844afebe133ea7485cc9993bb8378a3717d)\n* [9.1.1805](https://github.com/vim/vim/commit/7d903eaccf07932b71c7445b7a592f926e6ed5e2): Amiga: Missing build date in version string\n* [runtime(vim): Update base syntax, allow Vim9 :echo tail comments](https://github.com/vim/vim/commit/f4a6acd86edfdaf0f2c1fc4fb0c6533069d0469e)\n* [9.1.1804](https://github.com/vim/vim/commit/38b98bd8e6bfd46c32c7de9d99d7556bbc68c08f): Wrong indentation of nested ifdefs in findfile.c\n* [9.1.1803](https://github.com/vim/vim/commit/02f8d2ebd5cbccb5f04e5764bd4ffdaf3db6fd50): Amiga: build errors\n* [runtime(java): Recognise \_module\_ import declarations](https://github.com/vim/vim/commit/91ac18cb036f87ceff83bf8d05f7c03b50b94633)\n* [9.1.1802](https://github.com/vim/vim/commit/9d5208a9313dd8b0d62c97af5485f1715af98a1c): 'nowrap' in a modeline may hide malicious code\n* [9.1.1801](https://github.com/vim/vim/commit/ad43d2639d4031ff1893bde763505e6d4d13a6ca): Vim9: misleading error when extending dictionary\n* [9.1.1800](https://github.com/vim/vim/commit/d35e5e4237ec578962d3d577bc5a4e4f6bf4abb2): completion: strange behaviour with 'ac' completeopt=longest,preinsert\n* [9.1.1799](https://github.com/vim/vim/commit/3aa2edb5572ee0dbc34ab2317041b4cf65b37cc5): completion: crash with autcompletion