How do I map multiple replace commands in visual mode

Question

I'm trying to edit my init.vim to allow quick, custom retabbing with one key. My current attempt is as follows (the replace text in the last command is a tab character inputted in insert mode):

nnoremap <C-i> :%s/\s\+$//ge<CR>:%s/ \{2,}/ /ge<CR>
vmap <C-i> :'<,'>s/\s\+$//ge<CR>:'<,'>s/ \{2,}/ /ge<CR>

The normal mode map works perfectly, but I can't figure out why the visual map doesn't. The only thing it does is report:

E488: Trailing characters

Why doesn't the visual map work the same way as the normal mode map, and is what I'm attempting impossible?

Answer 1

The '<,'> in your first command get inserted automatically when entering : from visual mode. Remove them.