tshark Tek options not human readable

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Yes, it's supposed to be readable by Elasticsearch. As the TShark man page says:

T ek|fields|json|jsonraw|pdml|ps|psml|tabs|text
Set the format of the output when viewing decoded packet data. The options are one of:

ek Newline delimited JSON format for bulk import into Elasticsearch. ...

I.e., it was not designed, by the JSON/Elasticsearch people, for easy human readability, it was designed for easy readability by Elasticsearch. If that means that it's less human readable than intentionally human-readable text, that's life.