vim: Import v9.1.0457

* 9.1.0457: tests: test_gui fails on Wayland
* 9.1.0456: Left shift is incorrect with vartabstop and shiftwidth=0
* runtime(doc): clarify 'shortmess' flag "S"
* 9.1.0455: MS-Windows: compiler warning for size_t to int conversion
* runtime(doc): include some vim9 script examples in the help

gitlog.txt

@@ -1 +1 @@
-* [runtime(doc): include some vim9 script examples in the help](https://github.com/vim/vim/commit/bad9577b9ae7a6ab61ec636aaa1ed7d446ef5db9)\n* [9.1.0454](https://github.com/vim/vim/commit/f3dd6f617c65a9b939697362efe6833eb2778612): minor issues in test\_filetype with rasi test\n* [9.1.0453](https://github.com/vim/vim/commit/280e5b13ca568ed592a894140bf1ac74356f4b33): filetype: rasi files are not recognized\n* [runtime(java): Improve the matching of lambda expressions (#14880)](https://github.com/vim/vim/commit/7129f2ad2fd9de3e3812a569ba3ad6bf162fd238)
+* [9.1.0457](https://github.com/vim/vim/commit/e5bc2e4bc9e7456daef480dd422252dbf444c58c): tests: test\_gui fails on Wayland\n* [9.1.0456](https://github.com/vim/vim/commit/88d4f255b7b7a19bb4f6489e0ad0956e47d51fed): Left shift is incorrect with vartabstop and shiftwidth=0\n* [runtime(doc): clarify 'shortmess' flag "S"](https://github.com/vim/vim/commit/e299591498a20c5c587364e4df57f947dfc02897)\n* [9.1.0455](https://github.com/vim/vim/commit/16b63bd002d48fa0b04f27cf3ccca894e14db378): MS-Windows: compiler warning for size\_t to int conversion\n* [runtime(doc): include some vim9 script examples in the help](https://github.com/vim/vim/commit/bad9577b9ae7a6ab61ec636aaa1ed7d446ef5db9)