patch: strict key encoding for json.el

[Edward O'Connor]

Hi,

Nic Ferrier pointed out that the JSON encoder can produce invalid JSON
object keys in some cases. To guard against this, the attached patch
adds a new function, `json-encode-key', which throws if it's object
doesn't map to a JSON string. It then uses this function everywhere it
creates JSON objects. I've only lightly tested it, but "It Should
Work(TM)".


Ted

json-strict-key-encoding.patch
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