vim: Import v8.1.1773

* 8.1.1773: the preview popup window may be too far to the right
* 8.1.1772: options test still fails on MS-Windows
* 8.1.1771: options test fails on MS-Windows
* 8.1.1770: cannot get the window ID of the popup preview window
* 8.1.1769: 'shellslash' is also used for completion
* 8.1.1768: man plugin changes setting in current window
* 8.1.1767: FEAT_SESSION defined separately
* undo extra changes in src/Makefile
* 8.1.1766: code for writing session file is spread out
* 8.1.1765: get(func, dict, def) does not work properly

gitlog.txt

@@ -1 +1 @@
-* [8.1.1764](https://github.com/vim/vim/releases/tag/v8.1.1764): ":browse oldfiles" is not tested\n* [8.1.1763](https://github.com/vim/vim/releases/tag/v8.1.1763): evalfunc.c is still too big\n* [8.1.1762](https://github.com/vim/vim/releases/tag/v8.1.1762): some filetype rules are in the wrong place\n* [8.1.1761](https://github.com/vim/vim/releases/tag/v8.1.1761): filetype "vuejs" causes problems for some users\n* [8.1.1760](https://github.com/vim/vim/releases/tag/v8.1.1760): extra line break for wrapping output of :args\n* [8.1.1759](https://github.com/vim/vim/releases/tag/v8.1.1759): no mode char for terminal mapping from maparg()\n* [8.1.1758](https://github.com/vim/vim/releases/tag/v8.1.1758): count of g$ not used correctly when text is not wrapped\n* [8.1.1757](https://github.com/vim/vim/releases/tag/v8.1.1757): text added with appendbufline() isn't displayed\n* [8.1.1756](https://github.com/vim/vim/releases/tag/v8.1.1756): autocommand that splits window messes up window layout
+* [8.1.1773](https://github.com/vim/vim/releases/tag/v8.1.1773): the preview popup window may be too far to the right\n* [8.1.1772](https://github.com/vim/vim/releases/tag/v8.1.1772): options test still fails on MS-Windows\n* [8.1.1771](https://github.com/vim/vim/releases/tag/v8.1.1771): options test fails on MS-Windows\n* [8.1.1770](https://github.com/vim/vim/releases/tag/v8.1.1770): cannot get the window ID of the popup preview window\n* [8.1.1769](https://github.com/vim/vim/releases/tag/v8.1.1769): 'shellslash' is also used for completion\n* [8.1.1768](https://github.com/vim/vim/releases/tag/v8.1.1768): man plugin changes setting in current window\n* [8.1.1767](https://github.com/vim/vim/releases/tag/v8.1.1767): FEAT_SESSION defined separately\n* undo extra changes in src/Makefile\n* [8.1.1766](https://github.com/vim/vim/releases/tag/v8.1.1766): code for writing session file is spread out\n* [8.1.1765](https://github.com/vim/vim/releases/tag/v8.1.1765): get(func, dict, def) does not work properly