CLJS-1603: Only warn for misspelled comp/REPL opts

REPLs may have REPL-specific options which are added to the compiler/
REPL option map and this triggers "unknown compiler option" warnings.

Instead, only issue warnings when there are known suggestions within
the Levenshtein distance threshold. This effectively limits the feature
to its original use case of detecting minor misspellings.

Author: mfikes

src/main/clojure/cljs/build/api.clj

@@ -204,8 +204,8 @@
        (env/default-compiler-env opts))))
   ([source opts compiler-env]
    (doseq [[unknown-opt suggested-opt] (util/unknown-opts (set (keys opts)) closure/known-opts)]
-     (println (str "WARNING: Unknown compiler option '" unknown-opt "'."
-                (when suggested-opt (str " Did you mean '" suggested-opt "'?")))))
+     (when suggested-opt
+       (println (str "WARNING: Unknown compiler option '" unknown-opt "'. Did you mean '" suggested-opt "'?"))))
    (binding [ana/*cljs-warning-handlers* (:warning-handlers opts ana/*cljs-warning-handlers*)]
      (closure/build source opts compiler-env))))
 

src/main/clojure/cljs/repl.cljc

@@ -780,8 +780,8 @@
                   bind-err true}
              :as opts}]
   (doseq [[unknown-opt suggested-opt] (util/unknown-opts (set (keys opts)) (set/union known-repl-opts cljsc/known-opts))]
-    (println (str  "WARNING: Unknown option '" unknown-opt "'."
-               (when suggested-opt (str " Did you mean '" suggested-opt "'?")))))
+    (when suggested-opt
+      (println (str "WARNING: Unknown option '" unknown-opt "'. Did you mean '" suggested-opt "'?"))))
   (let [repl-opts (-repl-options repl-env)
         repl-requires (into repl-requires (:repl-requires repl-opts))
         {:keys [analyze-path repl-verbose warn-on-undeclared special-fns static-fns] :as opts