Adding List item via powershell - Multiline formatting is lost (no line breaks)

Hello guys,

i've got a problem when adding new items to a custom list in Sharepoint.
Inside powershell i've got a string with multiple lines.

Example:

#Just an example
$example = @"
Line 1
Line 2
Line 3"@


Write-Output $example


#Looks like this:
#Line 1
#Line 2
#Line 3

But when i add a new list item ($example to a multiline text column) to sharepoint like this:

$newItem["Description"] = $example
$newItem.Update()

it looks like this in Sharepoint:
Line1Line2Line3

My multineline column inside the view.aspx looks like this:

<td width="400px" valign="top" class="ms-formbody"><xsl:value-of select="@Description" disable-output-escaping="yes"/></td>

Sadly i NEED to use powershell for this.

Anybody got an idea?