Index with closing "/" on url or not?

I think the majority of pages on my site are indexed with a closing "/" eg .../fubar/
Am I hurting myself by doing this? Should I leave the urls open-ended?

submitted by /u/frsti
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from Search Engine Optimization: The Latest SEO News https://www.reddit.com/r/SEO/comments/dmuk3i/index_with_closing_on_url_or_not/>