Guardfile
guard 'rspec', :cli => "--color --format nested" do
watch(%r{^spec/(.+)_spec\.rb$}) { |m| "spec/#{m[1]}_spec.rb" }
watch(%r{^lib/(.+)\.rb$}) { |m| "spec/lib/#{m[1]}_spec.rb" }
watch(%r{^spec/support/*}) { 'spec' }
watch('spec/spec_helper.rb') { "spec" }
watch(%r{^spec/helpers/*}) { 'spec' }
end