" Activate syntax highlighting.
syntax on
filetype plugin on

" Don't add unsolicited final newline.
set binary

" Indentation rules (tabs to 4 spaces).
set expandtab
set shiftwidth=4
set softtabstop=4

" Backups.
set backup
set backupdir=~/.vimbackups
let myvar = strftime("%Y-%m-%d_%H-%M-%S")
let myvar = "set backupext=_". myvar
execute myvar