Tab completion should not replace ~ or variables.

E.g.

cd ~\<TAB>
vim $env:APPDATA\<TAB>
& $env:SystemRoot\<TAB>

When editing a script, the replacement might actually make the script less portable, e.g. $env:SystemRoot isn't always on the c: drive.

On the command line, you normally end up with a longer command line, and possibly less meaningful. It can also be less useful when searching your history.

We could have an option that control this behavior, but I suspect it should be the default.