fixed typo in the example of URI.extract.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@8653 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/uri/common.rb

@@ -541,8 +541,8 @@ module URI
   #
   #   require "uri"
   #
-  #   URI.extract("text here http://foo.bar.org/bla and here mailto:test@ruby.com and here also.")
-  #   # => ["http://foo.bar.com/foobar", "mailto:foo@bar.com"]
+  #   URI.extract("text here http://foo.example.org/bla and here mailto:test@example.com and here also.")
+  #   # => ["http://foo.example.com/bla", "mailto:test@example.com"]
   #
   def self.extract(str, schemes = nil, &block)
     if block_given?