vim: Import v8.1.0927

* 8.1.0927: USE_CR is never defined
* 8.1.0926: no test for :wnext, :wNext and :wprevious
* 8.1.0925: terminal scrollback test still still flaky
* 8.1.0924: terminal scrollback test still flaky
* 8.1.0923: terminal dump diff swap does not update file names

Author: chrisbra

gitlog.txt

@@ -1 +1 @@
-* [8.1.0922](https://github.com/vim/vim/releases/tag/v8.1.0922): terminal scrollback test is flaky\n* [8.1.0921](https://github.com/vim/vim/releases/tag/v8.1.0921): terminal test sometimes fails; using memory after free\n* [8.1.0920](https://github.com/vim/vim/releases/tag/v8.1.0920): in Terminal-Normal mode job output messes up the window\n* [8.1.0919](https://github.com/vim/vim/releases/tag/v8.1.0919): compiler warnings\n* [8.1.0918](https://github.com/vim/vim/releases/tag/v8.1.0918): MS-Windows: startup messages are not converted\n* [8.1.0917](https://github.com/vim/vim/releases/tag/v8.1.0917): double free when running out of memory\n* [8.1.0916](https://github.com/vim/vim/releases/tag/v8.1.0916): with Python 3.7 "find_module" is not made available\n* [8.1.0915](https://github.com/vim/vim/releases/tag/v8.1.0915): fsync() may not work properly on Mac
+* [8.1.0927](https://github.com/vim/vim/releases/tag/v8.1.0927): USE_CR is never defined\n* [8.1.0926](https://github.com/vim/vim/releases/tag/v8.1.0926): no test for :wnext, :wNext and :wprevious\n* [8.1.0925](https://github.com/vim/vim/releases/tag/v8.1.0925): terminal scrollback test still still flaky\n* [8.1.0924](https://github.com/vim/vim/releases/tag/v8.1.0924): terminal scrollback test still flaky\n* [8.1.0923](https://github.com/vim/vim/releases/tag/v8.1.0923): terminal dump diff swap does not update file names