Don't convert <script> text to XML entities.

Fixes #79.

lib/oga/xml/text.rb

@@ -9,7 +9,15 @@ module Oga
       # @see [Oga::XML::CharacterNode#to_xml]
       #
       def to_xml
-        return Entities.encode(super)
+        node = parent
+        root = root_node
+
+        if root.is_a?(Document) and node.is_a?(Element) \
+        and node.name == Lexer::SCRIPT_TAG and root.html?
+          return super
+        else
+          return Entities.encode(super)
+        end
       end
     end # Text
   end # XML

spec/oga/xml/text_spec.rb

@@ -26,6 +26,32 @@ describe Oga::XML::Text do
 
       node.to_xml.should == '&<>'
     end
+
+    describe 'inside an XML document' do
+      it 'encodes special characters as XML entities' do
+        document = Oga::XML::Document.new
+        script   = Oga::XML::Element.new(:name => 'script')
+        text     = described_class.new(:text => 'x > y')
+
+        script.children   << text
+        document.children << script
+
+        text.to_xml.should == 'x &gt; y'
+      end
+    end
+
+    describe 'inside an HTML <script> element' do
+      it 'does not encode special characters as XML entities' do
+        document = Oga::XML::Document.new(:type => :html)
+        script   = Oga::XML::Element.new(:name => 'script')
+        text     = described_class.new(:text => 'x > y')
+
+        script.children   << text
+        document.children << script
+
+        text.to_xml.should == 'x > y'
+      end
+    end
   end
 
   describe '#inspect' do