-bash flag failures in KOALA from the future branch

Running command:
```
export KOALA_SHELL="$PASH_TOP --width 4 --bash"
```
(--width doesn't really matter)

Scripts using this expansion “$1” fail in all ways with --bash (see previous issue)

Validation errors (execute.sh was successful):

Bio: [validate.sh](http://validate.sh/) fails for scripts: image_convert, thumbnail
Ci-cd : [validate.sh](http://validate.sh/) fails for: memcached
Oneliners: [validate.sh](http://validate.sh/) fails for: sort, sort-sort, unique-ips, spell
repl :[validate.sh](http://validate.sh/) produced the following error for ALL KOALA_SHELL attempts **(even without –bash)** :
```
Expected to be on 'bench_branch', but found 'main'
```

Other errors using --bash (execute.sh failed)

Unixfun:
```
cat: '': No such file or directory
```
Covid :
```
cat: '': No such file or directory
```

Start by reproducing the KOALA_SHELL command with --bash, then run execute.sh and validate.sh against the listed Bio, Ci-cd, Oneliners, Unixfun, and Covid scripts. Compare the $1-related failures and the repl branch error; done means the affected scripts validate and execute successfully with the reported shell modes.

Written by the indexing model from the issue text.