vim: Import v9.1.0516

* runtime(doc): clarify, that register 1-9 will always be shifted
* runtime(netrw): save and restore register 0-9, a and unnamed
* runtime(termdebug): Refactored StartDebug_term and EndDebug functions
* runtime(java): Compose "g:java_highlight_signature" and "g:java_highlight_functions"
* 9.1.0516: need more tests for nested dicts and list comparision
* 9.1.0515: Vim9: segfault in object_equal()

gitlog.txt

@@ -1 +1 @@
-* [9.1.0514](https://github.com/vim/vim/commit/7b29cc97d6c1450865969d08c5538a40c304593c): Vim9: issue with comparing objects recursively\n* [runtime(termdebug): Change some variables to Enums](https://github.com/vim/vim/commit/549ecc86365dc625e71e10b958525867c47e1cda)\n* [runtime(vim): Update base-syntax, fix function tail comments](https://github.com/vim/vim/commit/fc64ac0be2c4f9446798de4d66b029526d1afa85)\n* [9.1.0513](https://github.com/vim/vim/commit/f0e691442005c12a7c35746048f0942f44e23a4c): Vim9: segfault with object comparison
+* [runtime(doc): clarify, that register 1-9 will always be shifted](https://github.com/vim/vim/commit/ecd642af43dc496e92020422fded717e095d4bc1)\n* [runtime(netrw): save and restore register 0-9, a and unnamed](https://github.com/vim/vim/commit/62f7b55c1a4564f8744af9446bc7af47fe16a245)\n* [runtime(termdebug): Refactored StartDebug\_term and EndDebug functions](https://github.com/vim/vim/commit/225d4d9212edb27cc4bd473db565517594aaeede)\n* [runtime(java): Compose "g:java\_highlight\_signature" and "g:java\_highlight\_functions"](https://github.com/vim/vim/commit/01a4fb104dbee6a8b7ef20394a2a7c5b49cf49ca)\n* [9.1.0516](https://github.com/vim/vim/commit/88bbdb04c2776ba69b8e5da58051fd94f8842b03): need more tests for nested dicts and list comparision\n* [9.1.0515](https://github.com/vim/vim/commit/8625714ac13cba271f60687b33f0b63bd29feba1): Vim9: segfault in object\_equal()