if version >= "700"
version 7.0
+" Change status bar colour when entering insert mode.
+au InsertEnter * highlight StatusLine guifg=white guibg=darkred ctermbg=white ctermfg=darkred
+au InsertLeave * highlight StatusLine guifg=white guibg=blue ctermbg=white ctermfg=blue
+
" Make diffs vertical by default.
se diffopt+=vertical