kubectl-pod_logs breaks on non-POSIX Mac shell

OSX bash doesn't like ,, 

```
TMC02YJ3FXJGH6:kubefunc jdobner1$ RUN=(RUN Run run)
TMC02YJ3FXJGH6:kubefunc jdobner1$ echo ${RUN[1],,}
Run
TMC02YJ3FXJGH6:kubefunc jdobner1$ echo $SHELL
/bin/bash
```

This results in 
```
Select a Pod: 112
ERROR: Pod totally-real-eks-pod-name-5cd48dd956-7ktlb is not running
```

Because the status is `Running`