Separator for custom field display

I’m looking to display a custom field inline, so am using the following code:

[catlist tags="31days2021" orderby=date order=asc date=yes numberposts=-1 customfield_display="country" customfield_display_name="no" customfield_tag="span"]

It displays the data I would expect inline, but it pushes the country right up against the rest of the information, without a separator. How would I add a space or ” – ” to the data?

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