Fix response string generator by removing comma-delimiters
Fix response string generator by removing comma-delimiters

I forgot to add the '' empty string as the parameter to the String.join
call that built a response string from an array, which was causing
extraneous commas to be added to the results

vistadataproject/metaPureJS,vistadataproject/metaPureJS,vistadataproject/metaPureJS