For the sentence, "we'll all be dressed in red, white and blue, I wrote: "on sera tous habillés en rouge, blanc et bleu". The space after the comma after rouge was marked as an error and it was translated as "on sera tous habillés en rouge,blanc et bleu". Is this a thing with lists? I couldn't find any reference to it. (I have long thought that an exercise on French punctuation would be a good idea and very helpful.)
While I'm here, would it be possible to supply the accompanying vocabulary lists in French? I look up the English and use what I find, but it's so often wrong that it's frustrating and disheartening.