Wrap safe inner.

Author: jcs090218

docstr-util.el

@@ -137,8 +137,10 @@ and GREEDY."
 ;;
 
 (cl-defun docstr-util-default-format
-    (&key (fmt-type "{ %s }") (fmt-var "%s :") (param "@param ") (ret "@return "))
+    (&key (fmt-type "{ %s }") (fmt-var "%s :") (param "@param") (ret "@return"))
   "Set default format for document string."
+  (when param (setq param (concat param " ")))
+  (when ret (setq ret (concat ret " ")))
   (setq-local
    docstr-format-type fmt-type
    docstr-format-var fmt-var