vim stringify raw template

gistfile1.vim

" little vim function 
" make raw contents string    
" turn following raw template 
" <div class="show">
"   <span>{{data.name}}</span>
" </div>
" into string:
" '<div class="show">' +
"  '<span>{{data.name}}</span>' +
" '</div>'
function! Stringify() range                                                    
  for linenum in range(a:firstline, a:lastline)                                
    let replaceSub = "'\\1'\ +"                                                
    if a:lastline == linenum                                                   
      let replaceSub = "'\\1'"                                                 
    endif                                                                      
    let newline = getline(linenum)                                             
    " escape single quote                                                      
    let newline = substitute(newline,"\'", '"' ,'g')                           
    " add single quotes and plus                                               
    let newline = substitute(newline,'\(\S.*\)', replaceSub ,'g')              
    call setline(linenum, newline)                                             
  endfor                                                                       
endfunction