:let fname = 'bak/' . expand('%:t') . '_' . strftime('%Y_%m_%d_%H.%M.%S')
:w fname
:silent execute 'write' fname
:%s/ß/ß/ge
:%s/\s=\s/=/ge
:%s/ä/ä/ge
:%s/ö/ö/ge
:%s/ü/ü/ge
:%s/uü/ü/ge
:%s/ü/ü/ge
:%s/\.\.\./…/ge
:%s/>-</>–</ge