" Activate syntax highlighting.
syntax on
filetype plugin on

" Number lines.
set number

"" Don't add unsolicited final newline.
"set binary

" Indentation rules (tabs to 4 spaces).
set expandtab
set shiftwidth=2
set softtabstop=2

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

" Keep syntax highlighting healthy.
autocmd BufEnter * :syntax sync fromstart

" Mark the 80-th column.
set colorcolumn=80

" Source additions
source ~/.vimrc_add