[clojure] treat comma as whitespace

[finalfantasia]

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[alexdima]

@finalfantasia Why? I don't think we do this with any other tokenizer?

[finalfantasia]

@finalfantasia Why? I don't think we do this with any other tokenizer?

Oh, my bad, I should've given an explanation in the PR.

In Clojure, comma (,) is treated as whitespace, exactly the same as spaces, tabs, or newlines. Commas are thus never required in literal collections, but are often used to enhance readability.[1]

[1] https://clojure.org/guides/weird_characters#_whitespace_character

[alexdima]

Thank you!