Stripping leading commas breaks Fennel macros

The formatter works surprisinly well for Fennel (a Clojure-inspired dialect for Lua), I like the output much better than fnlfmt.
The only issue I encountered is difference in macros, Fennel uses comma for unqoute: ,form is like ~form in Clojure meaning leading commas are significant. When formatter strips them it can break a macro.

Example:

(macro when-let-repro [binding & body]
  (let [[binding-form expr] binding]
    `(let [temp# ,expr]
       (when temp#
         (let [,binding-form temp#]
           ,(unpack body))))))

Leading comma gets stripped:

@@ -2,5 +2,5 @@
   (let [[binding-form expr] binding]
     `(let [temp# ,expr]
        (when temp#
-         (let [,binding-form temp#]
+         (let [binding-form temp#]
            ,(unpack body))))))

Unfortunately Fennel does not support metadata, so adding #_:standard-clj/ignore causes compile error.

Start by running the formatter on the supplied Fennel macro example and trace where leading commas are removed. Inspect the formatter's handling of Fennel or Lua syntax; done means the comma before binding-form is preserved so the formatted macro remains valid.