Names '...', '....' etc. are not supported for aliases/functions

Created by: myfreeweb

Ion says "alias name is invalid" for the following:

alias ..="cd .."
alias ...="cd ../.."
alias ....="cd ../../.."
alias .....="cd ../../../.."

And "not a valid function name" for functions with the same names.

The first one is handled by implicit cd, but I want to have the other ones too...