[css-align-3] Clarify 'align-content' on table cells. Confirms w3c#4033

Author: fantasai

css-align-3/Overview.bs

@@ -937,18 +937,18 @@ The 'justify-content' and 'align-content' Properties</h3>
 			<td>
 				Does not apply to and has no effect on <a>block containers</a>.
 		<tr>
-			<th>''justify-content/normal'' Behavior
+			<th>''align-content/normal'' Behavior
 			<td>
-				All values other than ''justify-content/normal'' force the block container to [=establish an independent formatting context=].
+				All values other than ''align-content/normal'' force the block container to [=establish an independent formatting context=].
 
-				For table cells, the behavior of the ''justify-content/normal'' depends on the computed value of 'vertical-align':
+				For table cells, the behavior of ''align-content: normal'' depends on the computed value of 'vertical-align':
 				''vertical-align/top'' makes it behave as ''start'',
 				''vertical-align/middle'' makes it behave as ''center'',
 				''vertical-align/bottom'' makes it behave as ''end'',
 				and all other values make it behave as ''baseline''.
 				[[!CSS2]]
 
-				''justify-content/normal'' otherwise behaves as ''start''.
+				''align-content/normal'' otherwise behaves as ''start''.
 	</table>
 
 ### Multicol Containers ### {#distribution-multicol}