[Twisted-web] What's the correct way to deal with render_GET and unicode?

[Mark Wright]

If I return a unicode string from my Resource's render_GET, I get a
500 error that says "Request did not return a string".  I guess that
means I'm responsible for encoding the response, but do I then need to
write a render_HEAD to set the charset for the message?  Are there any
examples of how to do this?
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Mark Wright
markscottwright at gmail.com