My .vimrc with PrettyXML

.vimrc

call pathogen#infect()
filetype plugin indent on
syntax on
set tabstop=4
set shiftwidth=4
set showmatch
set number

map <F3> <Esc>gg=G<CR>
imap <F3> <Esc>gg=G<CR>
map <F5> :w<CR>:!node %:p<CR>
imap <F5> <Esc>:w<CR>:!node %:p<CR>
map <F2> <Esc>:wqa<CR>
map <F6> <Esc>gg"*yG<CR>
nmap <F4> :w<CR>:make<CR>:cw<CR>
nmap <C-k> :tabprev<CR>
nmap <C-l> :tabnext<CR>
nmap <C-n> :tabnew<CR>
autocmd VimEnter * NERDTree
autocmd VimEnter * wincmd p
autocmd BufNewFile,BufRead *.json set ft=javascript

function! DoPrettyXML()
	  " save the filetype so we can restore it later
	  let l:origft = &ft
	  set ft=
	  " delete the xml header if it exists. This will
	  " permit us to surround the document with fake tags
	  " without creating invalid xml.
	  1s/<?xml .*?>//e
	  " insert fake tags around the entire document.
	  " This will permit us to pretty-format excerpts of
	  " XML that may contain multiple top-level elements.
	  0put ='<PrettyXML>'
	  $put ='</PrettyXML>'
	  silent %!xmllint --format -
	  " xmllint will insert an <?xml?> header.
	  " it's easy enough to delete
	  " if you don't want it.
	  " delete the fake tags
	  2d
	  $d
	  " restore the 'normal'
	  " indentation, which is one extra level
	  " too deep due to the extra tags we wrapped around the document.
	  silent %<
	  " back to home
	  1
	  " restore the filetype
	  exe "set ft=" . l:origft
endfunction
command! PrettyXML call DoPrettyXML()