adds code examples for negative ordinalize

activesupport/lib/active_support/inflector/methods.rb

@@ -135,6 +135,8 @@ def constantize(camel_cased_word) #:nodoc:
     #   ordinalize(2)     # => "2nd"
     #   ordinalize(1002)  # => "1002nd"
     #   ordinalize(1003)  # => "1003rd"
+    #   ordinalize(-11)   # => "-11th"
+    #   ordinalize(-1021) # => "-1021st"
     def ordinalize(number)
       if (11..13).include?(number.to_i.abs % 100)
         "#{number}th"
@@ -148,4 +150,4 @@ def ordinalize(number)
       end
     end
   end
-end
\ No newline at end of file
+end