How to ask for help on #vim

example

I want to visually select this and hit \t

| thi s | is          | a    | test  | of     |
| epic  | proportions | that | i'm   | trying |
| out   | today       | as   | I     | make   |
| this  | table       | with | tabul | arize  |

to make it look like this:

thi s  is           a     test   of    
=====  ===========  ====  =====  ======
epic   proportions  that  i'm    trying
out    today        as    I      make  
this   table        with  tabul  arize 

This is what I have:

vnoremap <leader>t :call <SID>table()<cr>
function! s:table()
   mark a
   let hsepline= substitute(getline("."),'[^|]','=','g')
   exe "norm! o" .  hsepline
   exe "'a,'>s/=|/ |/g"
   exe "'a,'>s/|=/| /g"
   exe "'a,'>s/^| \\| |$\\||//g"
endfunction