Fixed bad markup and wrong initial value of background-blend-mode

Author: Rik Cabanier

compositing-1/Overview.bs

@@ -53,9 +53,9 @@ This module also extends the <a href="http://www.w3.org/TR/2dcontext2/#dom-conte
 <h3 id="values">Values</h3>
 
 This specification follows the <a href="http://www.w3.org/TR/CSS21/about.html#property-defs">CSS property
-definition conventions</a> from [CSS21]. Value types not defined in
-this specification are defined in CSS Level 2 Revision 1 [CSS21]. Other CSS
-modules may expand the definitions of these value types: for example [CSS3COLOR],
+definition conventions</a> from [[!CSS21]]. Value types not defined in
+this specification are defined in CSS Level 2 Revision 1 [[!CSS21]]. Other CSS
+modules may expand the definitions of these value types: for example [[!CSS3COLOR]],
 when combined with this module, expands the definition of the &lt;color>
 value type as used in this specification.
 
@@ -266,7 +266,7 @@ In CSS, a background image or the content of an <a element>img</a> must always b
 
 In SVG, 'mask' always creates an isolated group.
 
-h4 id="background-blend-mode">The 'background-blend-mode' property</h4>
+<h4 id="background-blend-mode">The 'background-blend-mode' property</h4>
 
 Defines the blending mode of each background layer.
 
@@ -276,7 +276,7 @@ The description of the 'background-blend-mode' property is as follows:
 
 <pre class='propdef'>
 Name: background-blend-mode
-Value: <<blend-mode>>
+Value: <<blend-mode>>#
 Initial: normal
 Applies to: All HTML elements
 Inherited: no