转载自博客:http://shoukaiseki.blog.163.com/blog/static/1928561492012194407689/
win平台下下载后的comments.vim放到./vimfiles/plugin目录
快捷键为Ctrl+C注释,Ctrl+X取消注释
" key-mappings for comment line in normal mode
noremap <silent> <C-C> :call CommentLine()<CR>
" key-mappings for range comment lines in visual <Shift-V> mode
vnoremap <silent> <C-C> :call RangeCommentLine()<CR>