Autocomplete should quote property names ending in "?"

[HumanEquivalentUnit]

Property names ending with ? character can't be used unless the property name is quoted, but autocomplete with TAB does not quote them. (Related to discussion in #3240)

Steps to reproduce

$o = [PSCustomObject]@{
    'test?' = 1
    'test|' = 2
}

PS C:\> $o.test{TAB}
# cycles through
# $o.test?      # this won't work without quotes around the property name
# $o.'test|'

Expected behavior

PS C:\> $o.test{TAB}
# cycles through
# $o.'test?'                # expected, this one is quoted
# $o.'test|'

Environment data

PS C:\> $PSVersionTable

Name                           Value
----                           -----
PSVersion                      7.0.0-preview.1
PSEdition                      Core
GitCommitId                    7.0.0-preview.1
OS                             Microsoft Windows 10.0.17763
Platform                       Win32NT
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

[iSazonov]

We should wait #3240 to make a conclusion here.

[msftrncs]

I think my PR attempts to address this, #10226.

[msftrncs]

[microsoft-github-policy-service]

This issue has not had any activity in 6 months, if this is a bug please try to reproduce on the latest version of PowerShell and reopen a new issue and reference this issue if this is still a blocker for you.

[microsoft-github-policy-service]

This issue has not had any activity in 6 months, if this is a bug please try to reproduce on the latest version of PowerShell and reopen a new issue and reference this issue if this is still a blocker for you.

[microsoft-github-policy-service]

This issue has been marked as "No Activity" as there has been no activity for 6 months. It has been closed for housekeeping purposes.