I recently read an article ( Which no longer exists 
) talking about purtifying erlang. This inspired me to create a quick function in vim to do this for me!
Here it is:
function! ErlPretty()
silent !erl -noshell -eval 'erl_tidy:file("%",[verbose]).' -s erlang halt
endfunction
nmap ep :execute ErlPretty()
Hopefully someone finds it handy!