add tests for reader conditional with whitespace before list.

Author: Yannick Scherer

test/rewrite_clj/parser_test.clj

@@ -192,7 +192,8 @@
   "#macro 1"                 :reader-macro    [:token :whitespace :token]
   "#macro (* 2 3)"           :reader-macro    [:token :whitespace :list]
   "#?(:clj bar)"             :reader-macro    [:token :list]
-  "#?@(:clj bar)"            :reader-macro    [:token :list]
+  "#? (:clj bar)"            :reader-macro    [:token :whitespace :list]
+  "#?@ (:clj bar)"           :reader-macro    [:token :whitespace :list]
   "#?foo baz"                :reader-macro    [:token :whitespace :token]
   "#_abc"                    :uneval          [:token]
   "#_(+ 1 2)"                :uneval          [:list]