CLJS-2933: Consistent #object printing whitespace

Author: dek5

src/main/cljs/cljs/core.cljs

@@ -10280,13 +10280,13 @@ reduces them without incurring seq initialization"
 
   Atom
   (-pr-writer [a writer opts]
-    (-write writer "#object [cljs.core.Atom ")
+    (-write writer "#object[cljs.core.Atom ")
     (pr-writer {:val (.-state a)} writer opts)
     (-write writer "]"))
 
   Volatile
   (-pr-writer [a writer opts]
-    (-write writer "#object [cljs.core.Volatile ")
+    (-write writer "#object[cljs.core.Volatile ")
     (pr-writer {:val (.-state a)} writer opts)
     (-write writer "]"))
 

src/test/cljs/cljs/core_test.cljs

@@ -1663,3 +1663,7 @@
     (is (= m4 (merge-with + (sorted m1) (sorted m2) m3)))
     (is (= m4 (merge-with + m1 (sorted m2) m3)))
     (is (= m4 (merge-with + m1 (sorted m2) (sorted m3))))))
+
+(deftest test-cljs-2933
+  (is (= "#object[cljs.core.Atom {:val 1}]" (pr-str (atom 1))))
+  (is (= "#object[cljs.core.Volatile {:val 2}]" (pr-str (volatile! 2)))))