Fix code typo

* lisp/org.el (org-sparse-tree): Fix code typo.  Small refactoring.

Thanks to Brady Trainor for spotting it.
http://permalink.gmane.org/gmane.emacs.orgmode/85320

lisp/org.el

@@ -13476,49 +13476,44 @@ a      Show deadlines and scheduled items after a date.
 d      Show deadlines due within `org-deadline-warning-days'.
 D      Show deadlines and scheduled items between a date range."
   (interactive "P")
-  (let (ans kwd value ts-type)
-    (setq type (or type org-sparse-tree-default-date-type))
-    (setq org-ts-type type)
-    (message "Sparse tree: [/]regexp [t]odo [T]odo-kwd [m]atch [p]roperty\n             [d]eadlines [b]efore-date [a]fter-date [D]ates range\n             [c]ycle through date types: %s"
-	     (cond ((eq type 'all) "all timestamps")
-		   ((eq type 'scheduled) "only scheduled")
-		   ((eq type 'deadline) "only deadline")
-		   ((eq type 'active) "only active timestamps")
-		   ((eq type 'inactive) "only inactive timestamps")
-		   ((eq type 'scheduled-or-deadline) "scheduled/deadline")
-		   ((eq type 'closed) "with a closed time-stamp")
-		   (t "scheduled/deadline")))
-    (setq ans (read-char-exclusive))
-    (cond
-     ((equal ans ?c)
-      (org-sparse-tree
-       arg (cadr (member type '(scheduled-or-deadline
-				all scheduled deadline active inactive closed)))))
-     ((equal ans ?d)
-      (call-interactively 'org-check-deadlines))
-     ((equal ans ?b)
-      (call-interactively 'org-check-before-date))
-     ((equal ans ?a)
-      (call-interactively 'org-check-after-date))
-     ((equal ans ?D)
-      (call-interactively 'org-check-dates-range))
-     ((equal ans ?t)
-      (call-interactively 'org-show-todo-tree))
-     ((equal ans ?T)
-      (org-show-todo-tree '(4)))
-     ((member ans '(?T ?m))
-      (call-interactively 'org-match-sparse-tree))
-     ((member ans '(?p ?P))
-      (setq kwd (org-icompleting-read "Property: "
-				      (mapcar 'list (org-buffer-property-keys))))
-      (setq value (org-icompleting-read "Value: "
-					(mapcar 'list (org-property-values kwd))))
-      (unless (string-match "\\`{.*}\\'" value)
-	(setq value (concat "\"" value "\"")))
-      (org-match-sparse-tree arg (concat kwd "=" value)))
-     ((member ans '(?r ?R ?/))
-      (call-interactively 'org-occur))
-     (t (user-error "No such sparse tree command \"%c\"" ans)))))
+  (setq type (or type org-sparse-tree-default-date-type))
+  (setq org-ts-type type)
+  (message "Sparse tree: [/]regexp [t]odo [T]odo-kwd [m]atch [p]roperty
+             [d]eadlines [b]efore-date [a]fter-date [D]ates range
+             [c]ycle through date types: %s"
+	   (case type
+	     (all "all timestamps")
+	     (scheduled "only scheduled")
+	     (deadline "only deadline")
+	     (active "only active timestamps")
+	     (inactive "only inactive timestamps")
+	     (scheduled-or-deadline "scheduled/deadline")
+	     (closed "with a closed time-stamp")
+	     (otherwise "scheduled/deadline")))
+  (let ((answer (read-char-exclusive)))
+    (case answer
+      (?c
+       (org-sparse-tree
+	arg
+	(cadr (memq type '(scheduled-or-deadline all scheduled deadline active
+						 inactive closed)))))
+      (?d (call-interactively #'org-check-deadlines))
+      (?b (call-interactively #'org-check-before-date))
+      (?a (call-interactively #'org-check-after-date))
+      (?D (call-interactively #'org-check-dates-range))
+      (?t (call-interactively #'org-show-todo-tree))
+      (?T (org-show-todo-tree '(4)))
+      (?m (call-interactively #'org-match-sparse-tree))
+      ((?p ?P)
+       (let* ((kwd (org-icompleting-read
+		    "Property: " (mapcar #'list (org-buffer-property-keys))))
+	      (value (org-icompleting-read
+		      "Value: " (mapcar #'list (org-property-values kwd)))))
+	 (unless (string-match "\\`{.*}\\'" value)
+	   (setq value (concat "\"" value "\""))))
+       (org-match-sparse-tree arg (concat kwd "=" value)))
+      ((?r ?R ?/) (call-interactively #'org-occur))
+      (otherwise (user-error "No such sparse tree command \"%c\"" answer)))))
 
 (defvar org-occur-highlights nil
   "List of overlays used for occur matches.")