vim-trailing-whitespace.vim

"Trailing whitespace stuff
function ShowSpaces(...)
  let @/="\\v(\\s+$)|( +\\ze\\t)"
  let oldhlsearch=&hlsearch
  if !a:0
    let &hlsearch=!&hlsearch
  else
    let &hlsearch=a:1
  end
  return oldhlsearch
endfunction
 
function TrimSpaces() range
  let oldhlsearch=ShowSpaces(1)
  execute a:firstline.",".a:lastline."substitute ///gec"
  let &hlsearch=oldhlsearch
endfunction
 
command -bar -nargs=? ShowSpaces call ShowSpaces(<args>)
command -bar -nargs=0 -range=% TrimSpaces <line1>,<line2>call TrimSpaces()
nnoremap <F6> :ShowSpaces 1<CR>
nnoremap <S-F6> m`:TrimSpaces<CR>``
vnoremap <S-F6> :TrimSpaces<CR>