commented out confusing text

Author: howcom

css3-multicol/Overview.src.html

@@ -373,9 +373,9 @@ <h2>The multi-column model</h2>
 is, column boxes behave like block-level, table cell, and inline-block
 boxes as per CSS 2.1, section 10.1, item 2 [[!CSS21]]. However, column
 boxes do not establish containing blocks for elements with ''position:
-fixed'' or ''position: absolute''. Percentage values that are calculated
+fixed'' or ''position: absolute''. <!--Percentage values that are calculated
 relative to the containing block height are calculated based on the
-multicol element's height, not the column box's height.
+multicol element's height, not the column box's height.-->
 
 
 <div class=example>