Rake::GemPackageTask is deprecated. Use Gem::PackageTask (require 'rubygems/package_task').
'rake/rdoctask' is obsolete and no longer supported. Use 'rdoc/task' (available in RDoc 2.4.2+) instead.
RCov does not work on Ruby 1.9.x.
DEPRECATION: Use 'double' instead of 'mock' and 'stub'. Use 'stub' instead of 'stub!'.
Method map is undefined for String in Ruby 1.9 as String is no longer Enumerable.
Color doesn't work in RSpec rake task.