README in rubymisc-0.0.3 vs README in rubymisc-0.0.3.1

@@ -1,7 +1,7 @@
 1 What is Rubymisc (Ruby miscellaneous | /ˈru:bi ˌmisəˈleiniəs/)
-  Miscellaneous and humble tool-set of useful Ruby
+  Miscellaneous and humble tool-set of useful Ruby (RUBY_VERSION >= 1.9.3)
 
   1.1 Installation
     gem install rubymisc
 
 2 Usage
@@ -34,11 +34,11 @@
     #percent_of
       e12: 50.percent_of(100)           # => 50.0
 
   2.4 String
 
-    #^
-      e13: 'rubymisc' ^ 'test'          # => "\u0006\u0010\u0011\r\u0019\f\u0000\u0017"
+    #^, #xor
+      e13: 'rubymisc'.xor 'test'        # => "\u0006\u0010\u0011\r\u0019\f\u0000\u0017"
 
   2.5 ActiveRecord::Base
 
     .validates_url
     .validates_email