Review Request 30046: Patch for KAFKA-1879

[Gwen Shapira]

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Review request for kafka.


Bugs: KAFKA-1879
    https://issues.apache.org/jira/browse/KAFKA-1879


Repository: kafka


Description
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fix string format


Diffs
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  core/src/main/scala/kafka/server/KafkaApis.scala 
7def85254b1a17bfcaef96e49c3c98bc5a93c423 

Diff: https://reviews.apache.org/r/30046/diff/


Testing
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Thanks,

Gwen Shapira