Mac で howm.vim を使う (前の誤りを訂正)

前の修正は，実はだめだめだったので修正した．

% diff -C 3 howm-mode.vim howm_vim/plugin/howm-mode.vim
*** howm-mode.vim	2009-01-19 11:02:11.000000000 +0900
--- ~/src/howm_vim/plugin/howm-mode.vim	2009-01-19 10:45:24.000000000 +0900
***************
*** 1639,1645 ****
      let searchResult = ""
    endif
    while buf != "" || searchResult != ""
-     let buf = substitute(buf, '//', '/', 'g')
      let bufidx = matchend(buf, '^\([a-zA-Z]:/\|/\)\?\([^:/]\+/\)*[^:/]\+:')
      let b:file{i} = strpart(buf, 0, bufidx - 1)
      let buf = strpart(buf, bufidx)
--- 1639,1644 ----