[nvim] Add yank highlight and substitution preview

Added quick highlighting of whatever text is added to a yank buffer.
Added live preview of `:%s/sub/command/` in current buffer and preview
window.

nvim/.config/nvim/init.vim

@@ -138,6 +138,9 @@ set undofile
 set ignorecase
 set smartcase
 
+" shows previews of what substitute command will do (and a couple others)
+set inccommand=split
+
 " whenever vim loses focus, save
 au FocusLost * :wa
 

nvim/.config/nvim/plugin/personal/highlightyank.vim

@@ -0,0 +1,5 @@
+" will highlight any text which has been yanked
+augroup LuaHighlight
+  autocmd!
+  autocmd TextYankPost * silent! lua require'vim.highlight'.on_yank()
+augroup END

nvim/.config/nvim/spell/en.utf-8.add

@@ -38,3 +38,5 @@ plugin
 Solidarność
 transnationalism
 heroization
+technologization
+Kyūshū