[css3-sizing] Specify that fill-available treats auto margins as zero.

Author: tabatkins

css3-sizing/Overview.html

@@ -875,47 +875,10 @@ <h2 id=extrinsic-sizing><span class=secno>5. </span> Extrinsic Size
     href="#definite-size"><i>definite</i></a> and the second value otherwise.
   </ul>
 
-  <p> …less the box's inline-axis margins (after <a
+  <p> …less the box's inline-axis margins (after any <a
    href="http://www.w3.org/TR/CSS21/box.html#collapsing-margins">margin
-   collapsing</a>), borders, and padding. <!--
-	<hr>
-
-	<p>
-		To find the inner <i>fill-available measure</i> of a box:
-
-	<ol>
-		<li>
-			If the measure of its containing block is <i>definite</i>,
-			use that measure.
-
-			<p>
-				Otherwise, use the inner <i>fill-available measure</i> of the element establishing its containing block.
-
-		<li>
-			If the computed 'max-measure' of the element establishing its containing block if that measure is <i>definite</i>,
-			and less than the measure found in the previous step,
-			use the computed 'max-measure' instead.
-
-		<li>
-			If the computed 'min-measure' of the element establishing its containing block if that measure is <i>definite</i>,
-			and greater than the measure found in the previous step,
-			use the computed 'min-measure' instead.
-
-		<li>
-			Subtract the box's inline-axis margins (after <a href="http://www.w3.org/TR/CSS21/box.html#collapsing-margins">margin collapsing</a>), borders, and padding from the measure found in the previous step.
-	</ol>
-
-	<hr>
-
-	<p>
-		The inner <i>fill-available measure</i> of a box is either
-		the measure of its containing block, if that is <i>definite</i>,
-		else the inner <i>fill-available measure</i> of the element establishing its containing block;
-		less the box's inline-axis margins (after <a href="http://www.w3.org/TR/CSS21/box.html#collapsing-margins">margin collapsing</a>), borders, and padding.
-		A containing block's size is <i>definite</i> if is established by an element
-		that is not inline and
-		whose computed measure, min-measure, and max-measure are <i>definite</i> (or, in the case of <i>max-measure</i>, ''none'').
--->
+   collapsing</a>, and treating ‘<code class=css>auto</code>’ margins as
+   zero), borders, and padding.
 
   <p> The <a href="#fill-available-extent"><i>fill-available extent</i></a>
    of a box is defined analogously, but in the other dimension.

css3-sizing/Overview.src.html

@@ -607,47 +607,10 @@ <h2 id='extrinsic-sizing'>
 				and where the first value is used if it is <i>definite</i> and the second value otherwise.
 		</ul>
 	<p>
-		&hellip;less the box's inline-axis margins (after <a href="http://www.w3.org/TR/CSS21/box.html#collapsing-margins">margin collapsing</a>), borders, and padding.
+		&hellip;less the box's inline-axis margins 
+		(after any <a href="http://www.w3.org/TR/CSS21/box.html#collapsing-margins">margin collapsing</a>, and treating ''auto'' margins as zero), 
+		borders, and padding.
 
-<!--
-	<hr>
-
-	<p>
-		To find the inner <i>fill-available measure</i> of a box:
-
-	<ol>
-		<li>
-			If the measure of its containing block is <i>definite</i>,
-			use that measure.
-
-			<p>
-				Otherwise, use the inner <i>fill-available measure</i> of the element establishing its containing block.
-
-		<li>
-			If the computed 'max-measure' of the element establishing its containing block if that measure is <i>definite</i>,
-			and less than the measure found in the previous step,
-			use the computed 'max-measure' instead.
-
-		<li>
-			If the computed 'min-measure' of the element establishing its containing block if that measure is <i>definite</i>,
-			and greater than the measure found in the previous step,
-			use the computed 'min-measure' instead.
-
-		<li>
-			Subtract the box's inline-axis margins (after <a href="http://www.w3.org/TR/CSS21/box.html#collapsing-margins">margin collapsing</a>), borders, and padding from the measure found in the previous step.
-	</ol>
-
-	<hr>
-
-	<p>
-		The inner <i>fill-available measure</i> of a box is either
-		the measure of its containing block, if that is <i>definite</i>,
-		else the inner <i>fill-available measure</i> of the element establishing its containing block;
-		less the box's inline-axis margins (after <a href="http://www.w3.org/TR/CSS21/box.html#collapsing-margins">margin collapsing</a>), borders, and padding.
-		A containing block's size is <i>definite</i> if is established by an element
-		that is not inline and
-		whose computed measure, min-measure, and max-measure are <i>definite</i> (or, in the case of <i>max-measure</i>, ''none'').
--->
 	<p>
 		The <i>fill-available extent</i> of a box is defined analogously,
 		but in the other dimension.