vim: Import v8.0.1520

* 8.0.1520: cursor in wrong line when using a WinBar in Terminal window
* 8.0.1519: getchangelist() does not use argument as bufname()
* 8.0.1518: error messages suppressed after ":silent! try"
* 8.0.1517: invalid memory acces with pattern using look-behind match
* 8.0.1516: errors for job options are not very specific
* 8.0.1515: BufWinEnter event fired when opening hidden terminal
* 8.0.1514: getting the list of changes is not easy
* 8.0.1513: the jumplist is not always properly cleaned up
* 8.0.1512: warning for possibly using NULL pointer
* 8.0.1511: some code for the debugger watch expression is clumsy
* 8.0.1510: cannot test if a command causes a beep

Author: chrisbra

gitlog.txt

@@ -1 +1 @@
-* [8.0.1509](https://github.com/vim/vim/releases/tag/v8.0.1509): test for failing drag-n-drop command no longer fails\n* [8.0.1508](https://github.com/vim/vim/releases/tag/v8.0.1508): the :drop command is not always available\n* [8.0.1507](https://github.com/vim/vim/releases/tag/v8.0.1507): timer test is a bit flaky\n* [8.0.1506](https://github.com/vim/vim/releases/tag/v8.0.1506): new version of HP NonStop (Tandem) doesn't like a header
+* [8.0.1520](https://github.com/vim/vim/releases/tag/v8.0.1520): cursor in wrong line when using a WinBar in Terminal window\n* [8.0.1519](https://github.com/vim/vim/releases/tag/v8.0.1519): getchangelist() does not use argument as bufname()\n* [8.0.1518](https://github.com/vim/vim/releases/tag/v8.0.1518): error messages suppressed after ":silent! try"\n* [8.0.1517](https://github.com/vim/vim/releases/tag/v8.0.1517): invalid memory acces with pattern using look-behind match\n* [8.0.1516](https://github.com/vim/vim/releases/tag/v8.0.1516): errors for job options are not very specific\n* [8.0.1515](https://github.com/vim/vim/releases/tag/v8.0.1515): BufWinEnter event fired when opening hidden terminal\n* [8.0.1514](https://github.com/vim/vim/releases/tag/v8.0.1514): getting the list of changes is not easy\n* [8.0.1513](https://github.com/vim/vim/releases/tag/v8.0.1513): the jumplist is not always properly cleaned up\n* [8.0.1512](https://github.com/vim/vim/releases/tag/v8.0.1512): warning for possibly using NULL pointer\n* [8.0.1511](https://github.com/vim/vim/releases/tag/v8.0.1511): some code for the debugger watch expression is clumsy\n* [8.0.1510](https://github.com/vim/vim/releases/tag/v8.0.1510): cannot test if a command causes a beep