Improve style of REPL test

[shnapz]

Adding a style improvement for the previous PR

[codecov]

Codecov Report

Merging #4629 (59f0b23) into main (e5e8773) will decrease coverage by 7.55%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #4629      +/-   ##
==========================================
- Coverage   68.23%   60.67%   -7.56%     
==========================================
  Files         269      286      +17     
  Lines        8261    10447    +2186     
  Branches      693      693              
==========================================
+ Hits         5637     6339     +702     
- Misses       2624     4108    +1484     

Impacted Files	Coverage Δ
...src/main/scala/com/spotify/scio/coders/Coder.scala	85.39% <0.00%> (-0.45%)	⬇️
.../scio/extra/sparkey/instances/SparkeySetBase.scala	0.00% <0.00%> (ø)
...scala/com/spotify/scio/elasticsearch/package.scala	100.00% <0.00%> (ø)
...om/spotify/scio/coders/instances/TupleCoders.scala	32.36% <0.00%> (ø)
...coders/instances/kryo/JTraversableSerializer.scala	82.60% <0.00%> (ø)
...om/spotify/scio/elasticsearch/CoderInstances.scala	42.42% <0.00%> (ø)
...om/spotify/scio/elasticsearch/CoderInstances.scala	100.00% <0.00%> (ø)
...scala/com/spotify/scio/elasticsearch/package.scala	100.00% <0.00%> (ø)
...scala/com/spotify/scio/elasticsearch/package.scala	100.00% <0.00%> (ø)
...m/spotify/scio/elasticsearch/ElasticsearchIO.scala	34.48% <0.00%> (ø)
... and 8 more

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