[#181] Add an example without version

Author: bbatsov

README.adoc

@@ -1907,6 +1907,7 @@ was deprecated in case of versioned software (e.g. a library) or simply
 
 [source,clojure]
 ----
+;; in case we have a version
 (def ^{:deprecated "0.5"} foo
   "Use `bar` instead.
   42)
@@ -1917,6 +1918,10 @@ was deprecated in case of versioned software (e.g. a library) or simply
 
 (defn ^{:deprecated "0.5"} foo
   (bar))
+
+;; otherwise
+(defn ^:deprecated foo
+  (bar))
 ----
 
 TIP: If you're into SemVer, it's a good idea to omit the patch version.