Original : https://www.powershellgallery.com/packages/FormatMarkdown/

Format-Markdown.Measure.ps1

measure-command {ps | Format-Markdown}

Format-Markdown.New.ps1

function Format-Markdown
{
    <#
    .Author
    Trevor Sullivan <trevor@trevorsullivan.net>
    http://trevorsullivan.net

    .Synopsis
    Formats an array of objects as a Markdown table.

    .Parameter Properties
    The -Properties parameter accepts an array of System.String objects, which
    represents the properties that will be retrieved from the input objects.

    .Parameter InputObject
    The -InputObject accepts an array of arbitrary objects. The objects should
    all be of the same type. If the input objects are of different types, then
    the output from this command will be unpredictable.

    .Example
    Get-Process -Name *b* | Format-Markdown -Properties Id,Name,WorkingSet;

    .Example
    Format-Markdown -Properties Name,Status,DisplayName -InputObject (Get-Service);
    #>
    [CmdletBinding()]
    param
    (
        [Parameter(ValueFromPipeline = $true, Mandatory = $true)]
        [Object[]] $InputObject,
        [string[]] $Properties = '*'
    )

    begin
    {
        $mdString = New-Object System.Collections.Generic.List[string];
    }

    process
    {
        # Get Properies for only once
        if ($null -eq $PropList)
        {
            $PropList = $InputObject | Get-Member -MemberType Property,NoteProperty,AliasProperty,ScriptProperty -Name $Properties;
        }

        # Create Markdown table internal string
        foreach ($Item in $InputObject)
        {
            $internalString = New-Object System.Collections.Generic.List[string];
            foreach ($Property in $PropList)
            {
                Write-Verbose -Message ('Item is: {0}; Property name is: {1}' -f $Item.ToString(), $Property.Name);
                try
                {
                    $PropValue = $null;
                    $PropValue = $Item.$($Property.Name).ToString();
                    $internalString.Add("|$PropValue");
                }
                catch
                {
                    Write-Verbose -Message ('Failed to obtain value for property: {0}' -f $Property.Name);
                }
            }
            $internalString.Add('|');
            $mdString.Add("$internalString");
        }
    }

    end
    {
        # Adding Markdown Table Header
        $headerList = New-Object System.Collections.Generic.List[string];
        foreach ($Property in $PropList)
        {
            $headerName = $Property.Name;
            $headerList.Add("|$headerName");
        }
        $headerList.Add('|');
        $headerString = ($PropList | ForEach-Object -Begin { "`r`n|" } -Process { '---|' } -End { '|'; });
        $headerList.Add($headerString);
        $mdString.Insert(0, "$headerList");

        return $mdString;
    }
}

Format-Markdown.Original.ps1

function Format-Markdown {
    <#
    .Author
    Trevor Sullivan <trevor@trevorsullivan.net>
    http://trevorsullivan.net

    .Synopsis
    Formats an array of objects as a Markdown table.

    .Parameter Properties
    The -Properties parameter accepts an array of System.String objects, which
    represents the properties that will be retrieved from the input objects.

    .Parameter InputObject
    The -InputObject accepts an array of arbitrary objects. The objects should
    all be of the same type. If the input objects are of different types, then
    the output from this command will be unpredictable.

    .Example
    Get-Process -Name *b* | Format-Markdown -Properties Id,Name,WorkingSet;

    .Example
    Format-Markdown -Properties Name,Status,DisplayName -InputObject (Get-Service);
    #>
    [CmdletBinding()]
    param (
        [Parameter(ValueFromPipeline = $true, Mandatory = $true)]
        [System.Object[]] $InputObject
      , [string[]] $Properties = '*'
    )

    begin {
    }

    process {
        $Params = $PSBoundParameters;
        foreach ($Item in $InputObject) {
        $MDString += "`n";
        foreach ($Property in ($Item | Get-Member -MemberType Property,NoteProperty,AliasProperty,ScriptProperty -Name $Properties)) {
            Write-Verbose -Message ('Item is: {0}; Property name is: {1}' -f $Item.ToString(), $Property.Name);
            try {
                $PropValue = $null;
                $PropValue = $Item.$($Property.Name).ToString();
                $MDString += '|{0}' -f $PropValue;
            } catch {
                Write-Verbose -Message ('Failed to obtain value for property: {0}' -f $Property.Name);
            }
        }
        $MDString += '|';
        }
    }

    end {
        $PropList = $InputObject | Get-Member -MemberType Property,NoteProperty,AliasProperty,ScriptProperty -Name $Properties;
        $Header = '';
        foreach ($Property in $PropList) {
            $Header += '|{0}' -f $Property.Name;
        }
        $Header += '|';
        $Header += $PropList | ForEach-Object -Begin { "`r`n|" } -Process { '---|' } -End { '|'; };

        $MDString = $MDString.Insert(0, $Header);
        Write-Output $MDString;
    }
}

New.md

Days              : 0
Hours             : 0
Minutes           : 0
Seconds           : 4
Milliseconds      : 213
Ticks             : 42137417
TotalDays         : 4.87701585648148E-05
TotalHours        : 0.00117048380555556
TotalMinutes      : 0.0702290283333333
TotalSeconds      : 4.2137417
TotalMilliseconds : 4213.7417

Original.md

Days              : 0
Hours             : 0
Minutes           : 0
Seconds           : 5
Milliseconds      : 875
Ticks             : 58757014
TotalDays         : 6.80058032407407E-05
TotalHours        : 0.00163213927777778
TotalMinutes      : 0.0979283566666667
TotalSeconds      : 5.8757014
TotalMilliseconds : 5875.7014