Add `let*`?

[vemv]

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let macroexpands to let*. let* doesn't appear to be a 'thing' (actual macro), but still it seems a good target to be indented.

Sometimes I include macroexpansions as part of the unit tests for some macros, and this let* would appear there. In those cases cljfmt would indent it badly, while Emacs wouldn't.

Sounds good to fix?

[weavejester]

Yep, this is fine.

[or]

What's left to do here? Just an entry of let* [[:block 1]] in indents/clojure.clj?