vim-cheetsheet.md

auto reindent and reformate tabs: gg=G

fix tabs:

filetype plugin indent on                                                               │
" show existing tab with 4 spaces width                                                 │
set tabstop=4                                                                           │
" when indenting with '>', use 4 spaces width                                           │
set shiftwidth=4                                                                        │
" On pressing tab, insert 4 spaces                                                      │
set expandtab