rdoc version 2.4.0 has been released!

RDoc is an application that produces documentation for one or more Ruby source
files. RDoc includes the +rdoc+ and +ri+ tools for generating and displaying
online documentation.

At this point in time, RDoc 2.x is a work in progress and may incur further
API changes beyond what has been made to RDoc 1.0.1. Command-line tools are
largely unaffected, but internal APIs may shift rapidly.

See RDoc for a description of RDoc's markup and basic use.

Changes:

### 2.3.1 / ??

* N Minor Enhancements
* `ri -f html` is now XHTML-happy
* Clarified RDoc::Markup link syntax. Bug #23517 by Eric Armstrong.
* Number of threads to parse with is now configurable
* Darkfish can now use alternate templates from $LOAD_PATH via -T
* Removed F95 parser in favor of the rdoc-f95 gem
* Moved HTML and XML generators to unmaintained
* No gem will be provided as it's too difficult to make them work
* Removed options --one-file, --style=, --inline-source, --promiscuous,
--op-name
* Removed support for --accessor, use regular documentation or
the method directive instead. See RDoc::Parser::Ruby
* Removed --ri-system as it is unused by Ruby's makefiles
* Added method list to index.html

* N Bug Fixes
* nodoc'd classes no longer appear in the index. Bug #23751 by Clifford
Heath.
* Fix 1.9 compatibility issues. Bug #23815 by paddor.
* Darkfish now respects --charset
* RDoc no longer attempts to be lazy when building HTML. This is a
workaround. Bug #23893 by Stefano Crocco.
* RDoc doesn't crash with def (blah).foo() end
* RDoc doesn't crash with #define functions