Deferred docs say that a "CancelledError" is returned but instead a "Deferred Cancelled" is returned

[ptwobrussell]

Maybe this is a documentation error, maybe it's a coding error. I don't know. But I do know that the inline documentation for Deferred says that a CancelledError? will be returned if you call cancel() and in reality a "Deferred Cancelled" is returned. Easy fix either way, I suppose. See Deferred.js (as or r12491) for details.

[dmachi]

There isn't really any such thing as a CancelledError?...this just sends a Error with that as the text. It also sets a dojoType="cancel" property on the error object. This is basically how it is distinguished now. We can look at doing something differently if people feel strongly about it.