Weekly github digest (Distributed Tracing WG specs)

Issues
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* w3c/trace-context (+1/-0/💬2)
  1 issues created:
  - Backport #423 to `level-1` (by dyladan)
    https://github.com/w3c/trace-context/issues/424 

  1 issues received 2 new comments:
  - #422 Contradiction in TraceState requirements (2 by dyladan)
    https://github.com/w3c/trace-context/issues/422 



Pull requests
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* w3c/trace-context (+1/-2/💬0)
  1 pull requests submitted:
  - Remove contradiction in TraceState mutations (by dyladan)
    https://github.com/w3c/trace-context/pull/423 

  2 pull requests merged:
  - Improve wording on tracestate mutations
    https://github.com/w3c/trace-context/pull/421 [editorial] 
  - Add a document describing uses for optional fields
    https://github.com/w3c/trace-context/pull/419 


Repositories tracked by this digest:
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* https://github.com/w3c/trace-context
* https://github.com/w3c/correlation-context
* https://github.com/w3c/distributed-tracing-wg


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