[css-align-3] Define alignment of static-positioned abspos under absp…

…os, simply matching the alignment container to the static position rectangle. #1432 <https://lists.w3.org/Archives/Public/www-style/2018Jul/0028.html>

css-align-3/Overview.bs

@@ -1365,7 +1365,6 @@ Inline/Main-Axis Alignment: the 'justify-self' property</h3>
 
 	This section describes the effect of 'justify-self'
 	on how the margin box of an absolutely-positioned box
-	which is not statically-positioned
 	is positioned with respect to its (absolute-positioning) containing block.
 
 	<table class="data align-details">
@@ -1379,6 +1378,9 @@ Inline/Main-Axis Alignment: the 'justify-self' property</h3>
 				The box's <a>containing block</a>,
 				as modified by the inset properties ('top'/'right'/'bottom'/'left'),
 				assuming the <a>writing mode</a> of the <a>containing block</a>.
+				If both inset properties in the relevant axis are ''left/auto'',
+				then use the box’s <a>static position rectangle</a>
+				(i.e. set both insets to the box’s <a>static position</a>).
 		<tr>
 			<th><a>Alignment Subject</a>
 			<td>
@@ -1422,37 +1424,6 @@ Inline/Main-Axis Alignment: the 'justify-self' property</h3>
 				see [[#justify-abspos-static]].)
 	</table>
 
-### Static Position of Absolutely-Positioned Boxes ### {#justify-abspos-static}
-
-	This section describes the effect of 'justify-self'
-	on how the margin box of an absolutely-positioned box
-	which is statically-positioned
-	is positioned with respect to its <a>static-position rectangle</a>.
-
-	<table class="data align-details">
-		<tr>
-			<th>'justify-self' Axis
-			<td>
-				The inline/row/main axis of the box's parent box.
-		<tr>
-			<th><a>Alignment Container</a>
-			<td>
-				The box's <a>static-position rectangle</a>,
-				as defined by its parent box's layout mode,
-				assuming the <a>writing mode</a> of the <a href="https://www.w3.org/TR/CSS2/visudet.html#static-position">static-position containing block</a>.
-		<tr>
-			<th><a>Alignment Subject</a>
-			<td>
-				The box's margin box <em>after</em> laying out the box,
-				treated as fixed-size for the purpose of alignment,
-				assuming the <a>writing mode</a> of the box.
-		<tr>
-			<th>''justify-self/normal'' Behavior
-			<td>
-				Behaves as ''flex-start''
-				(the fallback of ''justify-self/stretch'' for fixed-size boxes).
-	</table>
-
 ### Table Cells ### {#justify-cell}
 
 	This property does not apply to table cells,
@@ -1574,6 +1545,9 @@ Block/Cross-Axis Alignment: the 'align-self' property</h3>
 				as modified by the inset properties
 				('top'/'right'/'bottom'/'left'),
 				assuming the <a>writing mode</a> of the <a>containing block</a>.
+				If both inset properties in the relevant axis are ''left/auto'',
+				then use the box’s <a>static position rectangle</a>
+				(i.e. set both insets to the box’s <a>static position</a>).
 		<tr>
 			<th><a>Alignment Subject</a>
 			<td>
@@ -1617,37 +1591,6 @@ Block/Cross-Axis Alignment: the 'align-self' property</h3>
 				see [[#align-abspos-static]].)
 	</table>
 
-### Static Position of Absolutely-Positioned Boxes ### {#align-abspos-static}
-
-	This section describes the effect of 'align-self'
-	on how the margin box of an absolutely-positioned box
-	which is statically-positioned
-	is positioned with respect to its <a>static-position rectangle</a>.
-
-	<table class="data align-details">
-		<tr>
-			<th>'align-self' Axis
-			<td>
-				The block/column/cross axis of the box's parent box.
-		<tr>
-			<th><a>Alignment Container</a>
-			<td>
-				The box's <a>static-position rectangle</a>,
-				as defined by its parent box's layout mode,
-				assuming the <a>writing mode</a> of the <a href="https://www.w3.org/TR/CSS2/visudet.html#static-position">static-position containing block</a>.
-		<tr>
-			<th><a>Alignment Subject</a>
-			<td>
-				The box's margin box <em>after</em> laying out the box,
-				treated as fixed-size for the purpose of alignment,
-				assuming the <a>writing mode</a> of the box.
-		<tr>
-			<th>''align-self/normal'' Behavior
-			<td>
-				Behaves as ''flex-start''
-				(the fallback of ''align-self/stretch'' for fixed-size boxes).
-	</table>
-
 ### Table Cells ### {#align-cell}
 
 	This property does not apply to table cells,