[css-position] Create a table from the abspos text for easier reference.

Author: tabatkins

css-position/Overview.bs

@@ -1421,6 +1421,98 @@ The width of absolute, page or fixed positioned, non-replaced elements</h3>
     <li>
     If 'right' is ''auto'', 'left' and 'width' are not ''auto'', then solve for 'right'.
   </ol>
+
+<table class=data id='abspos-auto'>
+  <style scoped>
+  #abspos-auto ul { list-style-type: none; }
+  </style>
+  <colgroup span=5></colgroup>
+  <colgroup span=1></colgroup>
+  <thead>
+    <tr>
+      <th colspan=5>Is auto?
+      <th rowspan=2>Result
+    <tr>
+      <th>'left'
+      <th>'width'
+      <th>'right'
+      <th>'margin-left'
+      <th>'margin-right'
+  <tbody>
+    <tr>
+      <td>✔
+      <td>✔
+      <td>✔
+      <td colspan=2>n/a
+      <td>
+        <ul>
+          <li>auto margins → zero
+          <li>left → static pos
+          <li>width → shrink-to-fit
+          <li>right → solve
+        </ul>
+    <tr>
+      <td rowspan=4>✘
+      <td rowspan=4>✘
+      <td rowspan=4>✘
+      <td>✔
+      <td>✘
+      <td rowspan=2>
+        auto margin → free space
+    <tr>
+      <td>✘
+      <td>✔
+    <tr>
+      <td>✔
+      <td>✔
+      <td>
+        <ul>
+          <li>margins split positive free space
+          <li>right margin gets negative free space
+        </ul>
+    <tr>
+      <td>✘
+      <td>✘
+      <td>
+        treat 'right' as ''right/auto''
+    <tr>
+      <td>✔
+      <td>✘
+      <td>✔
+      <td colspan=2>n/a
+      <td>
+        <ul>
+          <li>left → static pos
+          <li>right → solve
+        </ul>
+    <tr>
+      <td>✔
+      <td>✔
+      <td>✘
+      <td colspan=2>n/a
+      <td>
+        <ul>
+          <li>left → solve
+          <li>width → shrink-to-fit
+          <li>right → as specified
+        </ul>
+    <tr>
+      <td>✘
+      <td>✔
+      <td>✔
+      <td colspan=2>n/a
+      <td>
+        <ul>
+          <li>left → as specified
+          <li>width → shrink-to-fit
+          <li>right → solve
+        </ul>
+    <tr>
+      <td colspan=3>any one auto
+      <td colspan=2>n/a
+      <td>solve for auto
+</table>
+
 <!-- End section: The width of absolute, page or fixed positioned, non-replaced element -->
 
 <h3 id="center-non-replaced-width">