syntax on
filetype plugin on
+" Number lines.
+set nunber
+
" Don't add unsolicited final newline.
set binary
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