if exists("g:loaded_mein_chnglstnav") | finish | endif
let g:loaded_mein_chnglstnav = 1

function! s:Chng(...)
    if a:0 == 0 | return | endif
    execute "normal " . a:1 . (a:1 > 0 ? "g;" : "g,")
endfunction

command! -nargs=? Chng call s:Chng(<args>)
nmap <End> :changes<CR>:Chng<Space>