I have a question about how to render PDF attachments to tickets inline, 
rather than forcing the user to download them.

My setup:  I have set "render_unsafe_content = true" in the [attachments], 
[browser], and [wiki] sections in my trac.ini file.  I attach a PDF 
document to a ticket using the wiki markup "[raw-attachment:mydoc.pdf]".

When I attach a document using this syntax to a wiki page, it works as 
expected:  I click on the link for the attachment, and my browser displays 
the PDF file.

However, when I use the exact same syntax in a ticket, I click on the the 
link for the PDF attachment in the ticket, and I get the "*HTML preview not 
available*, since no preview renderer could handle it. Try downloading the 
file instead" message instead.

Is this a bug, or intended?  Am I missing some configuration piece?  As far 
as I can tell, there's no "render_unsafe_content" parameter I can set for 
[ticket].

TIA,

-- Scott

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