vim: Import v8.1.0278

* 8.1.0278: 'incsearch' highlighting does not accept reverse range
* 8.1.0277: 'incsearch' highlighting wrong in a few cases
* 8.1.0276: no test for 'incsearch' highlighting with :s
* 8.1.0275: 'incsearch' with :s doesn't start at cursor line

Author: chrisbra

gitlog.txt

@@ -1 +1 @@
-* [8.1.0274](https://github.com/vim/vim/releases/tag/v8.1.0274): 'incsearch' triggers on ":source"\n* [8.1.0273](https://github.com/vim/vim/releases/tag/v8.1.0273): invalid memory access when using 'incsearch'\n* Update runtime files.\n* [8.1.0272](https://github.com/vim/vim/releases/tag/v8.1.0272): options test fails if temp var ends in slash\n* [8.1.0271](https://github.com/vim/vim/releases/tag/v8.1.0271): 'incsearch' doesn't work for :s, :g or :v\n* [8.1.0270](https://github.com/vim/vim/releases/tag/v8.1.0270): checking for a Tab in a line could be faster\n* [8.1.0269](https://github.com/vim/vim/releases/tag/v8.1.0269): Ruby Kernel.#p method always returns nil\n* [8.1.0268](https://github.com/vim/vim/releases/tag/v8.1.0268): file type checking has too many #ifdef\n* [8.1.0267](https://github.com/vim/vim/releases/tag/v8.1.0267): no good check if restoring quickfix list worked
+* [8.1.0278](https://github.com/vim/vim/releases/tag/v8.1.0278): 'incsearch' highlighting does not accept reverse range\n* [8.1.0277](https://github.com/vim/vim/releases/tag/v8.1.0277): 'incsearch' highlighting wrong in a few cases\n* [8.1.0276](https://github.com/vim/vim/releases/tag/v8.1.0276): no test for 'incsearch' highlighting with :s\n* [8.1.0275](https://github.com/vim/vim/releases/tag/v8.1.0275): 'incsearch' with :s doesn't start at cursor line