I'm building some WSGI middleware and have noticed some odd behavior
with respect to return values from controller methods:

When a controller method returns a string, downstream middleware gets
a response of <type 'list'> where the first (and only) item in the
list is the string.

BUT

When a controller method returns an non-string, downstream middleware
just gets the object itself, not inside a list.

Does anybody know where the code responsible for this behavior lives?

Thanks!
~br

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