[css-overflow-4] Make note more readable (editorial)

Author: frivoal

css-overflow-4/Overview.bs

@@ -317,14 +317,13 @@ or the scrollbar is transparent or otherwise does not fully obscure the <a>scrol
 the background of the <a>scrollbar gutter</a> must be painted as an extension of the padding.
 
 <div class=note>
-Note: The following table summarizes the interaction of 'overflow' and 'scrollbar-gutter',
+Note: The following table summarizes the interaction of 'overflow' and 'scrollbar-gutter'
+for different types of scrollbars,
 showing in which case space is reserved for the <a>scrollbar gutter</a>.
-In this table, “G” represents cases where space is reserved for the <a>scrollbar gutter</a>,
-“f?” cases where space is reserved for the <a>scrollbar gutter</a>
-if ''scrollbar-gutter/force'' was specified,
-and empty cells cases where the no space is reserved.
 
 <table class=data>
+	<caption>
+		Should space be reserved for the [=scrollbar gutter=]?</caption>
 	<thead>
 	<tr>
 		<td>
@@ -342,41 +341,41 @@ and empty cells cases where the no space is reserved.
 	<tr>
 		<th rowspan=3>''overflow/scroll''
 		<th>''scrollbar-gutter/auto''
-		<td>G
-		<td>G
+		<td>yes
+		<td>yes
 		<td>
 		<td>
 	<tr>
 		<th>''scrollbar-gutter/stable''
-		<td>G
-		<td>G
+		<td>yes
+		<td>yes
 		<td>
 		<td>
 	<tr>
 		<th>''scrollbar-gutter/always''
-		<td>G
-		<td>G
-		<td>G
-		<td>G
+		<td>yes
+		<td>yes
+		<td>yes
+		<td>yes
 	<tr>
 		<th rowspan=3>''overflow/auto''
 		<th>''scrollbar-gutter/auto''
-		<td>G
+		<td>yes
 		<td>
 		<td>
 		<td>
 	<tr>
 		<th>''scrollbar-gutter/stable''
-		<td>G
-		<td>G
+		<td>yes
+		<td>yes
 		<td>
 		<td>
 	<tr>
 		<th>''scrollbar-gutter/always''
-		<td>G
-		<td>G
-		<td>G
-		<td>G
+		<td>yes
+		<td>yes
+		<td>yes
+		<td>yes
 	<tr>
 		<th rowspan=3>''overflow/visible'', ''overflow/hidden'', ''overflow/clip''
 		<th>''scrollbar-gutter/auto''
@@ -386,16 +385,16 @@ and empty cells cases where the no space is reserved.
 		<td>
 	<tr>
 		<th>''scrollbar-gutter/stable''
-		<td>f?
-		<td>f?
+		<td>if ''force''
+		<td>if ''force''
 		<td>
 		<td>
 	<tr>
 		<th>''scrollbar-gutter/always''
-		<td>f?
-		<td>f?
-		<td>f?
-		<td>f?
+		<td>if ''force''
+		<td>if ''force''
+		<td>if ''force''
+		<td>if ''force''
 </table>
 </div>