Clarify mappings for contenteditable (#463)

Author: scottaohara

index.html

@@ -3646,39 +3646,56 @@ HTML Attribute State and Property Mappings
               <td class="elements">
                 <a data-cite="html/interaction.html#attr-contenteditable">HTML elementsa>
               td>
-              <td class="aria">?td>
+              <td class="aria">
+                Not mapped
+              td>
               <td class="ia2">
+                <p>If the element is in the editable state, the following mappings apply to the element and every nested accessible object with the 
+                exception of those which have been specified in the `false` state.p>
                 <div class="states">
                   <span class="type">States:span>
-                  `IA2_STATE_EDITABLE` on this and every nested text accessible object
+                  `IA2_STATE_EDITABLE` and `IA2_STATE_MULTI_LINE`
                 div>
                 <div class="interfaces">
                   <span class="type">Interfaces:span>
-                  `IAccessibleEditableText` on this and every nested text accessible object
+                  `IAccessibleEditableText`
                 div>
+                <p>If the element is in the `false` state: not mapped.p>
+                <p>If the element is in the `inherit` state: match the editable state of its parent element.p>
               td>
               <td class="uia">
+                <p>If the element is in the editable state, the following mappings apply to the element and every nested accessible object with the 
+                exception of those which have been specified in the `false` state.p>
                 <div class="ctrltype">
                   <span class="type">Control Pattern:span> `TextEdit`
                 div>
+                <div class="property">
+                  <span class="type">Property:span> `AriaProperties.multiline:true`
+                div>
+                <p>If the element is in the `false` state: not mapped.p>
+                <p>If the element is in the `inherit` state: match the editable state of its parent element.p>
               td>
               <td class="atk">
+                <p>If the element is in the editable state, the following mappings apply to the element and every nested accessible object with the 
+                exception of those which have been specified in the `false` state.p>
                 <div class="states">
                   <span class="type">States:span>
-                  `ATK_STATE_EDITABLE` on this and every nested text accessible object.
+                  `ATK_STATE_EDITABLE` and `ATK_STATE_MULTI_LINE`
                 div>
                 <div class="interfaces">
-                  <span class="type">Interfaces:span>
-                  `AtkEditableText` on this and every nested text accessible object.
+                  <span class="type">Interfaces:span> `AtkEditableText`
                 div>
+                <p>If the element is in the `false` state: not mapped.p>
+                <p>If the element is in the `inherit` state: match the editable state of its parent element.p>
               td>
               <td class="ax">
                 <span class="type">Role:span>
                 <a href="#el-textarea">AXTextAreaa>
                 <div class="general">Use WAI-ARIA mappingdiv>
               td>
               <td class="comments">
-                If the element has the `contenteditable` attribute  and `aria-readonly="true"`, User Agents MUST expose only the `contenteditable` state.
+                If the element is set to `contenteditable`  and `aria-readonly="true"`, User Agents MUST expose only the `contenteditable` state.
               td>
             tr>
             <tr tabindex="-1" id="att-controls">