Merge pull request #806 from xml-project/fix-805

Attempt to fix 805

xproc/src/main/xml/specification.xml

@@ -475,7 +475,7 @@ linkend="xml-serialization-31"/>) by default.
 Within XProc, they are <link linkend="xml-documents">XML documents</link>.
 HTML documents are identified by an HTML media type.
 <termdef xml:id="dt-HTML-media-type">The
-“<literal>text/html</literal>” and “<literal>application/xhtml+xml</literal>
+  “<literal>text/html</literal>” and “<literal>application/xhtml+xml</literal>”
 media types
 are <firstterm baseform="HTML media type">HTML media types</firstterm>.
 </termdef>
@@ -501,7 +501,9 @@ in the pipeline) and will not be transformed in any way.</para>
 </listitem>
 <listitem>
 <para>When an HTML document is serialized, it <rfc2119>should</rfc2119> be serialized using the
-HTML serializer (see <xref linkend="xml-serialization-31"/>) by default.
+  HTML serializer for documents with media type “<literal>text/html</literal>” and the
+  XHTML serializer for those with media type “<literal>application/xhtml+xml</literal>” 
+  (see <xref linkend="xml-serialization-31"/>) by default.
 </para>
 </listitem>
 </orderedlist>