vim: Import v8.2.1905

* 8.2.1905: the wininfo list may contain stale entries
* 8.2.1904: still using default option values after using ":badd +1"
* 8.2.1903: buffer test fails with normal features
* 8.2.1902: default option values changed with :badd for existing buffer
* 8.2.1901: variable completion does not work in command line window

gitlog.txt

@@ -1 +1 @@
-* [8.2.1900](https://github.com/vim/vim/commit/02194d2bd54eacd0b7b9a017a3fe1702ecb80971): Vim9: command modifiers do not work\n* [8.2.1899](https://github.com/vim/vim/commit/67def64a4e4590a5f3b55ebfc33c42a3dcd7b559): crash in out-of-memory situation\n* [8.2.1898](https://github.com/vim/vim/commit/e10044015841711b989f9a898d427bcc1fdb4c32): command modifier parsing always uses global cmdmod\n* [8.2.1897](https://github.com/vim/vim/commit/5661ed6c833e05467cab33cb9b1c535e7e5cc570): command modifiers are saved and set inconsistently\n* [8.2.1896](https://github.com/vim/vim/commit/e1be11864d1f4383171e3af3eb77e61d41140c4e): valgrind warns for using uninitialized memory
+* [8.2.1905](https://github.com/vim/vim/commit/4882d983397057ea91c584c5a54aaccf15016d18): the wininfo list may contain stale entries\n* [8.2.1904](https://github.com/vim/vim/commit/89b693e5627715cde080c3580c7b641c9bf0c06a): still using default option values after using ":badd +1"\n* [8.2.1903](https://github.com/vim/vim/commit/37e4e03c67dacfc4a065e95492ffc4c7f490b44b): buffer test fails with normal features\n* [8.2.1902](https://github.com/vim/vim/commit/e974fa7b2b98e53a59d5ef16a6a1291f12a32e33): default option values changed with :badd for existing buffer\n* [8.2.1901](https://github.com/vim/vim/commit/4ff2f2fb6bef01a06bd726bae8dfa8dd6355d594): variable completion does not work in command line window