Fix clojure-sort-ns with comments in the end (#646)

Closes #645

Author: p4v4n

clojure-mode-util-test.el

@@ -136,7 +136,49 @@
       (expect (buffer-string) :to-equal
               "(ns my-app.core
     (:require [my-app.views [user-page :as user-page]]
-              [rum.core :as rum] ;comment\n))")))
+              [rum.core :as rum] ;comment
+))")))
+
+  (it "should sort requires in a basic ns with comments in the end"
+    (with-clojure-buffer "(ns my-app.core
+    (:require [rum.core :as rum] ;comment
+              [my-app.views [user-page :as user-page]]
+              ;;[comment2]
+))"
+      (clojure-sort-ns)
+      (expect (buffer-string) :to-equal
+              "(ns my-app.core
+    (:require [my-app.views [user-page :as user-page]]
+              [rum.core :as rum] ;comment
+
+              ;;[comment2]
+))")))
+  (it "should sort requires in ns with copyright disclamer and comments"
+   (with-clojure-buffer ";; Copyright (c) John Doe. All rights reserved.
+;; The use and distribution terms for this software are covered by the
+;; Eclipse Public License 1.0 (http://opensource.org/licenses/eclipse-1.0.php)
+(ns clojure.core
+  (:require
+   ;; The first comment
+   [foo] ;; foo comment
+   ;; Middle comment
+   [bar] ;; bar comment
+   ;; A last comment
+   ))"
+      (clojure-sort-ns)
+      (expect (buffer-string) :to-equal
+              ";; Copyright (c) John Doe. All rights reserved.
+;; The use and distribution terms for this software are covered by the
+;; Eclipse Public License 1.0 (http://opensource.org/licenses/eclipse-1.0.php)
+(ns clojure.core
+  (:require
+   ;; Middle comment
+   [bar] ;; bar comment
+   ;; The first comment
+   [foo] ;; foo comment
+
+   ;; A last comment
+   ))")))
 
   (it "should also sort imports in a ns"
     (with-clojure-buffer "\n(ns my-app.core