updated convertible to allow for posts with no, or empty YAML

lib/jekyll/convertible.rb

@@ -23,6 +23,8 @@ module Jekyll
       
         self.data = YAML.load($1)
       end
+      
+      self.data ||= {}
     end
 
     # Transform the contents based on the file extension.

lib/jekyll/page.rb

@@ -20,8 +20,6 @@ module Jekyll
       @dir  = dir
       @name = name
 
-      self.data = {}
-
       self.process(name)
       self.read_yaml(File.join(base, dir), name)
     end

test/source/_posts/2009-06-22-empty-yaml.textile

@@ -0,0 +1,3 @@
+---
+---
+Empty YAML.

test/source/_posts/2009-06-22-no-yaml.textile

@@ -0,0 +1 @@
+No YAML.

test/test_post.rb

@@ -236,6 +236,16 @@ class TestPost < Test::Unit::TestCase
         assert post.tags.include?('pizza')
       end
       
+      should "allow no yaml" do
+        post = setup_post("2009-06-22-no-yaml.textile")
+        assert_equal "No YAML.", post.content
+      end
+
+      should "allow empty yaml" do
+        post = setup_post("2009-06-22-empty-yaml.textile")
+        assert_equal "Empty YAML.", post.content
+      end
+
       context "rendering" do
         setup do
           clear_dest