Add warning to RawValue docs regarding untagged enums #704
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Hi,
This adds a warning to the docs of
RawValuefor this bug (deserializing to an untagged enum withRawValuealways fails).Because there is basically no usable information if deserializing to an untagged enum failes, a note like this would be useful to Rust beginners like me (it took me more than one hour to find out what the problem was).