Step by step configuration of Vim for spell-check & autocomplete.
##First install vim
sudo apt-get install vim
##Create vim config file
cd ~/
vi .vimrc
##Paste following lines in your vim config file
set spell
set spelllang=en_us
set complete+=k
autocmd FileType mail setlocal spell spelllang=en_us
autocmd BufRead COMMIT_EDITMSG setlocal spell spelllang=en_us
autocmd BufNewFile,BufRead *.md,*.mkd,*.markdown set spell spelllang=en_us
##Press ctrl + N to get suggestions of words
##To check spell or typo do following
1)Exit from insert mode
2)Go to highligted word and press `z=` to get list of suggestions
3)In normal mode press `]s` & `[s` to navigate left and righ highlighted word respectively
#Make sure to use Vim as default editor for Git
git config --global core.editor "vim"
#References 1)http://vimdoc.sourceforge.net/htmldoc/spell.html 2)http://vim.wikia.com/wiki/Dictionary_completions