When smalltalk_config is a ruby array string, extract the first value (#449)
When smalltalk_config is a ruby array string, extract the first value (#449)

* When smalltalk_config is a ruby array string, extract the first value

* Surround with $() and extend comment

Co-authored-by: Fabio Niephaus <e6fb06210fafc02fd7479ddbed2d042cc3a5155e@fniephaus.com>

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