Strings and Symbols are ignored as described class.

Closes https://rspec.lighthouseapp.com/projects/5645/tickets/1005

Gemfile

@@ -11,3 +11,4 @@ gem "flexmock"
 gem "rspec-core", :path => "."
 gem "rspec-expectations", :path => "../rspec-expectations"
 gem "rspec-mocks", :path => "../rspec-mocks"
+gem "ruby-debug"

lib/rspec/core/metadata.rb

@@ -139,7 +139,7 @@ def full_description_from(args)
       end
 
       def described_class_from(args)
-        if args.first.is_a?(String)
+        if args.first.is_a?(String) || args.first.is_a?(Symbol)
           superclass_metadata[:example_group][:describes]
         else
           args.first

rspec-core.gemspec

@@ -9,7 +9,7 @@ Gem::Specification.new do |s|
 
   s.required_rubygems_version = Gem::Requirement.new("> 1.3.1") if s.respond_to? :required_rubygems_version=
   s.authors = ["Chad Humphries", "David Chelimsky"]
-  s.date = %q{2010-06-21}
+  s.date = %q{2010-06-22}
   s.description = %q{RSpec runner and example groups}
   s.email = %q{dchelimsky@gmail.com;chad.humphries@gmail.com}
   s.executables = ["rspec", "spec"]
@@ -141,7 +141,7 @@ Gem::Specification.new do |s|
   s.rdoc_options = ["--charset=UTF-8"]
   s.require_paths = ["lib"]
   s.rubyforge_project = %q{rspec}
-  s.rubygems_version = %q{1.3.6}
+  s.rubygems_version = %q{1.3.7}
   s.summary = %q{rspec-core-2.0.0.beta.12}
   s.test_files = [
     "spec/autotest/failed_results_re_spec.rb",
@@ -184,7 +184,7 @@ Gem::Specification.new do |s|
     current_version = Gem::Specification::CURRENT_SPECIFICATION_VERSION
     s.specification_version = 3
 
-    if Gem::Version.new(Gem::RubyGemsVersion) >= Gem::Version.new('1.2.0') then
+    if Gem::Version.new(Gem::VERSION) >= Gem::Version.new('1.2.0') then
       s.add_development_dependency(%q<rspec-expectations>, [">= 2.0.0.beta.12"])
       s.add_development_dependency(%q<rspec-mocks>, [">= 2.0.0.beta.12"])
       s.add_development_dependency(%q<cucumber>, [">= 0.5.3"])

spec/rspec/core/example_group_spec.rb

@@ -127,6 +127,23 @@ module RSpec::Core
         end
       end
 
+      context "with a constant in an outer group" do
+        context "and a string in an inner group" do
+          it "is the top level constant" do
+            group = ExampleGroup.describe(String) do
+              describe :symbol do
+                example "describes is String" do
+                  debugger
+                  described_class.should eq(String)
+                end
+              end
+            end
+
+            group.run_all.should be_true
+          end
+        end
+      end
+
     end
 
     describe '#description' do

spec/rspec/core/metadata_spec.rb

@@ -25,6 +25,38 @@ module Core
         end
       end
 
+      describe "describes" do
+        context "with a String" do
+          it "returns nil" do
+            m = Metadata.new
+            m.process('group')
+
+            m = m.for_example("example", {})
+            m[:example_group][:describes].should be_nil
+          end
+        end
+
+        context "with a Symbol" do
+          it "returns nil" do
+            m = Metadata.new
+            m.process(:group)
+
+            m = m.for_example("example", {})
+            m[:example_group][:describes].should be_nil
+          end
+        end
+
+        context "with a class" do
+          it "returns the class" do
+            m = Metadata.new
+            m.process(String)
+
+            m = m.for_example("example", {})
+            m[:example_group][:describes].should be(String)
+          end
+        end
+      end
+
       describe "full description" do
         it "concats the example group name and description" do
           m = Metadata.new