" Don't use Ex mode, use Q for formatting
map Q gq
-" allow undoing in insert-mode
-inoremap <C-U> <C-G>u<C-U>
+" break undo sequence before removing word
inoremap <C-W> <C-G>u<C-W>
nmap <Leader>b :set expandtab tabstop=4 shiftwidth=4 softtabstop=4<CR>