Merge pull request w3c#523 from cdoublev/pr-523

[css-compositing][css-masking] Force rendering whitespaces around combinators

Author: tabatkins

compositing-2/Overview.bs

@@ -130,9 +130,15 @@ Animatable: no
 
 The syntax of the property of <<blend-mode>> is given with:
 
-<pre class="blendmode prod"><dfn id="ltblendmodegt">&lt;blend-mode></dfn> = <a value>normal</a> | <a value>multiply</a> | <a value>screen</a> | <a value>overlay</a> | <a value>darken</a> | <a value>lighten</a> | <a value>color-dodge</a> |
-  <a value>color-burn</a> | <a value>hard-light</a> | <a value>soft-light</a> | <a value>difference</a> | <a value>exclusion</a> | <a value>hue</a> |
-  <a value>saturation</a> | <a value>color</a> | <a value>luminosity</a></pre>
+<pre class="blendmode prod">
+  <dfn id="ltblendmodegt">&lt;blend-mode></dfn> =
+    <a value>normal</a> |
+    <a value>darken</a> | <a value>multiply</a> | <a value>color-burn</a> |
+    <a value>lighten</a> | <a value>screen</a> | <a value>color-dodge</a> |
+    <a value>overlay</a> | <a value>soft-light</a> | <a value>hard-light</a> |
+    <a value>difference</a> | <a value>exclusion</a> |
+    <a value>hue</a> | <a value>saturation</a> | <a value>color</a> | <a value>luminosity</a>
+</pre>
 
 Note: Applying a blendmode other than <a value>normal</a> to the element must establish a new [=stacking context=]. This group must then be blended and composited with the [=stacking context=] that contains the element.