OPS13 Export-MamlCommandHelp creates invalid XML

[sdwheeler]

Prerequisites

• [X] Write a descriptive title.
• [X] Make sure you are able to repro it on the latest released version
• [X] Search the existing issues.

Steps to reproduce

It looks like there is extra (incomplete) XML at the end the file.

• Example corrupt file: Microsoft.PowerShell.PlatyPS-Help.zip

It appears that the file ends on line 3450 but there is extra content after.

Expected behavior

$mdfiles = Measure-PlatyPSMarkdown -Path .\Microsoft.PowerShell.PlatyPS\*.md
$mdfiles | Where-Object Filetype -match 'CommandHelp' |
    Import-MarkdownCommandHelp -Path {$_.FilePath} |
    Export-MamlCommandHelp -OutputFolder .\maml
$x = [xml](gc .\maml\Microsoft.PowerShell.PlatyPS\Microsoft.PowerShell.PlatyPS-Help.xml)

Actual behavior

InvalidArgument: Cannot convert value "System.Object[]" to type "System.Xml.XmlDocument". Error: "The specified node cannot be inserted as the valid child of this node, because the specified node is the wrong type."

Error details

See attached screen shot

Environment data

OPS12 build

Visuals