test_in_exec: set default_internal / default_external encoding in command

fluent / fluentd

Fluentd: Unified Logging Layer (project under CNCF)

https://www.fluentd.org

Apache License 2.0

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Closed Watson1978 closed 1 week ago

Watson1978 commented 1 week ago

Which issue(s) this PR fixes: Fixes #4699

What this PR does / why we need it: Set default_internal / default_external in order to succeed CI on Ruby HEAD.

Docs Changes:

Release Note: