CLJS-2573: cljs.main: require with -e prints blank line

Author: dnolen

src/main/clojure/cljs/repl.cljc

@@ -779,7 +779,7 @@
     (.printStackTrace e *err*)))
 
 (defn repl-nil? [x]
-  (boolean (= "nil" x)))
+  (boolean (#{"" "nil"} x)))
 
 (defn run-inits [renv inits]
   (doseq [{:keys [type] :as init} inits]