Add home page link to output message (ruby#1165)

The link is clickable in the terminal and opens the home page in the browser

Author: st0012

lib/rdoc/rdoc.rb

@@ -520,6 +520,7 @@ def generate
       Dir.chdir @options.op_dir do
         unless @options.quiet then
           $stderr.puts "\nGenerating #{@generator.class.name.sub(/^.*::/, '')} format into #{Dir.pwd}..."
+          $stderr.puts "\nYou can visit the home page at: \e]8;;file://#{Dir.pwd}/index.html\e\\file://#{Dir.pwd}/index.html\e]8;;\e\\"
         end
 
         @generator.generate