Properly extract jar paths in cider.nrepl.middleware.ns/ns-path

Fixes clojure-emacs/cider#2681 (comment)
Allowing cider-find-ns to open files in jars.

Author: rpkarlsson

src/cider/nrepl/middleware/ns.clj

@@ -83,7 +83,7 @@
     (:file (info/info* {:dialect :cljs
                         :env cljs-env
                         :sym (symbol ns)}))
-    (.getPath (ns/canonical-source ns))))
+    (str (ns/canonical-source ns))))
 
 (defn ns-list-reply [msg]
   {:ns-list (ns-list msg)})

test/clj/cider/nrepl/middleware/ns_test.clj

@@ -101,7 +101,8 @@
         core-path (:path (session/message {:op "ns-path"
                                            :ns "clojure.core"}))]
     (is (.endsWith ns-path "cider/nrepl/middleware/ns.clj"))
-    (is (.endsWith core-path "clojure/core.clj"))))
+    (is (.endsWith core-path "clojure/core.clj"))
+    (is (.startsWith core-path "jar:"))))
 
 (deftest ns-load-all-integration-test
   (let [loaded-ns (:loaded-ns (session/message {:op "ns-load-all"}))]