Format doesn't work for comma `,` separated parameters

System Details

System Details Output

### VSCode version: 1.51.1 e5a624b788d92b8d34d1392e4c4d9789406efe8f x64

### VSCode extensions:
janisdd.vscode-edit-csv@0.6.0
ms-python.python@2021.2.633441544
ms-toolsai.jupyter@2021.2.576440691
ms-vscode.cpptools@1.1.3
ms-vscode.hexeditor@1.3.0
ms-vscode.powershell@2020.6.0
redhat.vscode-commons@0.0.6
redhat.vscode-xml@0.16.1


### PSES version: 2.2.0.0

### PowerShell version:

Name                           Value
----                           -----
PSVersion                      7.1.3
PSEdition                      Core
GitCommitId                    7.1.3
OS                             Microsoft Windows 10.0.19043
Platform                       Win32NT
PSCompatibleVersions           {1.0, 2.0, 3.0, 4.0…}
PSRemotingProtocolVersion      2.3
SerializationVersion           1.1.0.1
WSManStackVersion              3.0

Issue Description

Create a PowerShell file, input following script, and hit Alt+Shift+F. The file is not formatted.

    $a = [pscustomobject]@{
        a=1
      b=2
    }
            $a|Select-Object  a,b

Related settings in settings.json:

    "powershell.codeFormatting.trimWhitespaceAroundPipe": true,
    "powershell.codeFormatting.useCorrectCasing": true,
    "powershell.codeFormatting.whitespaceBetweenParameters": true,

Expected Behaviour

The format result should look similar to:

$a = [pscustomobject]@{
    a = 1
    b = 2
}
$a | Select-Object -Property a, b

Actual Behaviour

The file is unchanged.

Here are some other input/output combinations if I change the script a little bit and hit Alt+Shift+F again:

• Case 1 -- looks well except that the space is removed in a, b.
  • Input:

      $a = [pscustomobject]@{
          a=1
        b=2
      }
              $a|Select-Object  a, b
  

  • Output:

  $a = [pscustomobject]@{
      a = 1
      b = 2
  }
  $a | Select-Object a,b
  

• Case 2 -- the necessary comma , is removed in a ,b, which makes the code invalid.
  • Input:

      $a = [pscustomobject]@{
          a=1
        b=2
      }
              $a|Select-Object  a ,b
  

  • Output:

  $a = [pscustomobject]@{
      a = 1
      b = 2
  }
  $a | Select-Object a b
  

• Case 3 -- the space is removed in a, b.
  • Input:

  $a = [pscustomobject]@{
      a = 1
      b = 2
  }
  $a | Select-Object a, b
  

  • Output:

  $a = [pscustomobject]@{
      a = 1
      b = 2
  }
  $a | Select-Object a,b
  

• Case 4 -- this is the reverse of Case 3. If I keep hitting Alt+Shift+F, the file will cycle through Case 3 and 4.
  • Input:

  $a = [pscustomobject]@{
      a = 1
      b = 2
  }
  $a | Select-Object a,b
  

  • Output:

  $a = [pscustomobject]@{
      a = 1
      b = 2
  }
  $a | Select-Object a, b
  

Reproduce the issue in a PowerShell file using Alt+Shift+F with comma-separated parameters and the listed code-formatting settings. Compare the formatter output with the expected examples, including preserving commas and spaces in a, b; done means formatting is stable and the code remains valid.