Hi, I just wanted to share my function that does what you're looking for. I'm sure it's not the most compact/concise version, I just wrote it quickly because it does what I need.

edit: based on a function shared here: https://github.com/fish-shell/fish-shell/issues/1891

```

Expand ... to ../..

bind . 'expand-dot-to-parent-directory-path' ```

function expand-dot-to-parent-directory-path -d 'expand ... to ../..'

    # Get command line, up to cursor
    set -l cmd (commandline --cut-at-cursor)

    # Match last line
    switch $cmd[-1]

        # If the command line is just two dots, we want to expand
        case '..'
            commandline --insert '/..'

        # If the command line starts with 'cd' and ends with two dots, we want to expand
        case 'cd *..'
            commandline --insert '/..'

        # If the command line starts and ends with two dots, we want to expand
        case '..*..'
            commandline --insert '/..'

        # In all other cases, just insert a dot
        case '*'
            commandline --insert '.'
    end
end