vim: Import v9.1.0818

* runtime(netrw): simplify gx file handling
* 9.1.0818: some global functions are only used in single files
* 9.1.0817: termdebug: cannot evaluate expr in a popup
* runtime(defaults): Detect putty terminal and switch to dark background
* 9.1.0816: tests: not clear what tests cause asan failures
* runtime(doc): Remove some completed items from todo.txt
* 9.1.0815: "above" virtual text causes wrong 'colorcolumn' position

Author: github-actions[bot]

gitlog.txt

@@ -1 +1 @@
-* [runtime(syntax-tests): tiny vim fails because of line-continuation](https://github.com/vim/vim/commit/de79f9129adca68f4b209c95a04500e97f626c5e)\n* [9.1.0814](https://github.com/vim/vim/commit/fdf135a0525746cc0ff85bed2fbbde320ddb6d0d): mapset() may remove unrelated mapping
+* [runtime(netrw): simplify gx file handling](https://github.com/vim/vim/commit/3d7e567ea7392e43a90a6ffb3cd49b71a7b59d1a)\n* [9.1.0818](https://github.com/vim/vim/commit/a04003a929e443813c8060242e9809135b134a4c): some global functions are only used in single files\n* [9.1.0817](https://github.com/vim/vim/commit/8f1d09828a92469a7fa824a8653bf689a7864d21): termdebug: cannot evaluate expr in a popup\n* [runtime(defaults): Detect putty terminal and switch to dark background](https://github.com/vim/vim/commit/2abec431e1ab5f4f6e21c2bb490241732622a8c5)\n* [9.1.0816](https://github.com/vim/vim/commit/ce35ee89864784930d16392d5fd5dea1fab17f9c): tests: not clear what tests cause asan failures\n* [runtime(doc): Remove some completed items from todo.txt](https://github.com/vim/vim/commit/912fbaf6e8f50db44ece9b3f3a1babe21e77fa49)\n* [9.1.0815](https://github.com/vim/vim/commit/91d26aa338224fd0370c75fac9dc062cdcd18470): "above" virtual text causes wrong 'colorcolumn' position