Ckl file fails XML validation with Stig Viewer 2.8

[cawwot]

Describe the bug
Attempting to import a CKL file that was exported using New-StigChecklist into Stig Viewer 2.8 fails with the error message "Checklist failed XML schema validation for checklist schema V2.0". CKL works in Stig Viewer version 2.7.1 and previous.

To Reproduce

1. Create CKL using New-StigChecklist
2. Open checklist in Stig Viewer 2.8 using the "Open Checklist from File" option
3. Checklist fails to open and error appears

Screenshots

[athaynes]

Thanks @cawwot I'll add this in with #258 for the 3.0 update

[stevehose]

The issue should remain open but there is a workaround. In STIG Viewer (Version 2.8 for sure - other versions likely), before attempting to open a .ckl file, update preferences. To do so, select Options > Preferences from the menu. In the Preferences dialog, select the Checklist tab. On this tab, uncheck the Validate Checklists option. After this change has been made, the .ckl files generated by PowerStig can be opened.

[github-4me]

I came across this problem today and fixed this by using tab indention, I found this code here

function Format-XML ([xml]$xml)
{
$stringbuilder = New-Object System.Text.StringBuilder
$settings = New-Object System.Xml.XmlWriterSettings
$settings.Indent = $true
$settings.IndentChars = "tt"
$xmlWriter = [System.XML.XmlWriter]::Create($stringbuilder, $settings)
$xml.WriteContentTo($xmlWriter)
$xmlWriter.Close()
$xmlDoc = [System.Xml.XmlDocument]::new()
$xmlDoc.PreserveWhitespace = $true
$xmlDoc.LoadXml($stringbuilder.ToString())
return $xmlDoc
}

CKL file opens correctly in STIG Viewer 2.10 now.