work around keyword issue

tests/basilisp_kernel/integration/notebook_test.lpy

@@ -42,7 +42,7 @@
                        [{:metadata {},
                          :output_type "execute_result",
                          :execution_count 1,
-                         :data {(keyword "text/plain") "13"}}],,
+                         :data {(keyword nil "text/plain") "13"}}]
                        :execution_count 1,
                        :source "(+ 4 9)",}]
                       (for [cell cells]
@@ -85,12 +85,12 @@
     (is *notebook*)
     (is *client*)
     (let [{:keys [cells]} (py->lisp (.execute *client*))]
-      (is (= {(keyword "text/plain") "39"} (get-in cells [0 :outputs 0 :data])) cells))))
+      (is (= {(keyword nil "text/plain") "39"} (get-in cells [0 :outputs 0 :data])) cells))))
 #_(pp/pprint (with-notebook-test))
 
 (defn code-output-text-get
   [cell]
-  (get-in cell [:outputs 0 :data (keyword "text/plain")]))
+  (get-in cell [:outputs 0 :data (keyword nil "text/plain")]))
 
 (defn cell-output-get
   "Returns the `CELL`'s :outputs in the following format according to their `output_type`:
@@ -108,7 +108,7 @@
               (let [{nm :name text :text} output]
                 (assoc-in acc [:stream nm] text))
               "execute_result"
-              (let [text (get-in output [:data (keyword "text/plain")])]
+              (let [text (get-in output [:data (keyword nil "text/plain")])]
                 (assoc-in acc [:result :text] text))
               ))
           {} (:outputs cell)))
@@ -160,6 +160,10 @@
             (let [out-value-after (-> (.execute-cell *client* (last cells) ** :cell-index 6)
                                       py->lisp
                                       cell-output-get)]
-              (is (= {:text "1"} (:result out-value-after)) out-value-after))))))))
+              (is (= {:text "1"} (:result out-value-after)) out-value-after))
+            )
+          )
+        )
+      )))
 #_(pp/pprint (nrepl-server-test))