Fix broken links

CONTRIBUTING.rdoc

@@ -8,7 +8,7 @@ classes for each feature.
 == Bugs
 
 If you think you found a bug, file a ticket on the {issues
-tracker}[https://github.com/rdoc/rdoc/issues] on github.
+tracker}[https://github.com/ruby/rdoc/issues] on github.
 
 If your bug involves an error RDoc produced please include a sample file that
 illustrates the problem or link to the repository or gem that is associated
@@ -17,8 +17,8 @@ with the bug.
 Please include steps to reproduce the issue.  Here are some examples of good
 issues:
 
-* https://github.com/rdoc/rdoc/issues/55
-* https://github.com/rdoc/rdoc/issues/61
+* https://github.com/ruby/rdoc/issues/55
+* https://github.com/ruby/rdoc/issues/61
 
 == Developer Quick Start
 
@@ -35,7 +35,7 @@ This will install all the necessary dependencies for development with rake,
 generate documentation and run the tests for the first time.
 
 If the tests don't pass on the first run check the {Travis CI page for
-RDoc}[https://travis-ci.org/rdoc/rdoc] to see if there are any known failures
+RDoc}[https://travis-ci.org/ruby/rdoc] to see if there are any known failures
 (there shouldn't be).
 
 You can now use `rake` and `autotest` to run the tests.

README.rdoc

@@ -47,7 +47,7 @@ contain just Markup-style markup (with or without leading '#' comment
 markers).  If directory names are passed to RDoc, they are scanned
 recursively for C and Ruby source files only.
 
-To generate documentation using +rake+ see RDoc::Task[https://rdoc.github.io/rdoc/RDocTask.html].
+To generate documentation using +rake+ see RDoc::Task[https://ruby.github.io/rdoc/RDocTask.html].
 
 To generate documentation programmatically:
 

lib/rdoc/generator/template/darkfish/_footer.rhtml

@@ -1,5 +1,5 @@
 <footer id="validator-badges" role="contentinfo">
-  <p><a href="http://validator.w3.org/check/referer">Validate</a>
-  <p>Generated by <a href="https://rdoc.github.io/rdoc">RDoc</a> <%= RDoc::VERSION %>.
+  <p><a href="https://validator.w3.org/check/referer">Validate</a>
+  <p>Generated by <a href="https://ruby.github.io/rdoc/">RDoc</a> <%= RDoc::VERSION %>.
   <p>Based on <a href="http://deveiate.org/projects/Darkfish-RDoc/">Darkfish</a> by <a href="http://deveiate.org">Michael Granger</a>.
 </footer>

lib/rdoc/markup.rb

@@ -377,7 +377,7 @@
 #
 # Example links:
 #
-#   https://github.com/rdoc/rdoc
+#   https://github.com/ruby/rdoc
 #   mailto:user@example.com
 #   {RDoc Documentation}[http://rdoc.rubyforge.org]
 #   {RDoc Markup}[rdoc-ref:RDoc::Markup]
@@ -764,7 +764,7 @@ def self.parse str
 
 Please file a bug report with the above information at:
 
-https://github.com/rdoc/rdoc/issues
+https://github.com/ruby/rdoc/issues
 
     EOF
     raise

lib/rdoc/servlet.rb

@@ -217,7 +217,7 @@ def error exception, req, res
 <pre>#{ERB::Util.html_escape exception.message}</pre>
 
 <p>Please report this to the
-<a href="https://github.com/rdoc/rdoc/issues">RDoc issues tracker</a>.  Please
+<a href="https://github.com/ruby/rdoc/issues">RDoc issues tracker</a>.  Please
 include the RDoc version, the URI above and exception class, message and
 backtrace.  If you're viewing a gem's documentation, include the gem name and
 version.  If you're viewing Ruby's documentation, include the version of ruby.

test/test_rdoc_markup_to_html_snippet.rb

@@ -494,9 +494,9 @@ def test_convert_limit_paragraphs
     rdoc = <<-RDOC
 = \RDoc - Ruby Documentation System
 
-* {RDoc Project Page}[https://github.com/rdoc/rdoc/]
-* {RDoc Documentation}[https://rdoc.github.io/rdoc]
-* {RDoc Bug Tracker}[https://github.com/rdoc/rdoc/issues]
+* {RDoc Project Page}[https://github.com/ruby/rdoc]
+* {RDoc Documentation}[https://ruby.github.io/rdoc]
+* {RDoc Bug Tracker}[https://github.com/ruby/rdoc/issues]
 
 == DESCRIPTION: