nvim: add plugin to manage tabs/spaces

nvim/init.vim

@@ -10,6 +10,7 @@ call plug#begin('~/.cache/nvim/plugged')
 Plug 'https://github.com/farmergreg/vim-lastplace' " intelligently reopen files at last edit position
 Plug 'https://github.com/ntpeters/vim-better-whitespace' " highlights trailing whitespace, :StripWhitespace to remove
 Plug 'https://github.com/tpope/vim-sensible' " defaults everyone can agree on
+Plug 'https://github.com/tpope/vim-sleuth' " heuristically set buffer options
 Plug 'https://github.com/vim-airline/vim-airline' " fancy statusline
 call plug#end()
 
@@ -23,11 +24,6 @@ let g:loaded_matchparen=1
 " write settings
 set confirm " confirm :q in case of unsaved changes
 
-" tab/space settings
-set expandtab
-set shiftwidth=2
-set softtabstop=2
-
 " clipboard settings
 set clipboard=unnamedplus " enable copy/paste/yank to and from Vim/Neovim