Incorrect syntax highlighting for PowerShell strings

[danielniccoli]

I stumbled over PowerShell code, that has incorrect syntax highlighting.

<code PowerShell>
$x = @"
"Curiouser and curiouser!" cried Alice (she was so much surprised, 
that for the moment she quite forgot how to speak good English); 
"now I'm opening out like the largest telescope that ever was! 
Good-bye, feet!" 
"@
</code>

This is how it looks like:

There are more code examples here: https://technet.microsoft.com/en-us/library/ee692792.aspx

I also posted this over at GeSHi/geshi-1.0#58 as I am not sure where this belongs to.

[splitbrain]

upstream issue.

[danielniccoli]

What does upstream issue mean?

[polyzen]

@Borkason, Upstream being geshi