[css-text-4] fix wrap-* applies-to

Author: fantasai

css-text-4/Overview.bs

@@ -259,7 +259,7 @@ Inline breaks between boxes: the 'wrap-before'/'wrap-after' properties</h3>
 	Name: wrap-before, wrap-after
 	Value: auto | avoid | avoid-line | avoid-flex | line | flex
 	Initial: auto
-	Applies to: all elements
+	Applies to: <a>inline-level</a> boxes and <a>flex items</a>
 	Inherited: no
 	Percentages: n/a
 	Computed value: as specified
@@ -300,13 +300,12 @@ Inline breaks between boxes: the 'wrap-before'/'wrap-after' properties</h3>
 		<dt><dfn>line</dfn>
 		<dd>
 			Force a line break before/after the element
-			if this is a valid line break point.
+			if the element is an inline-level box.
 
 		<dt><dfn>flex</dfn>
 		<dd>
-			Force a flex line break before/after the element
-			if this is a valid flex line break point
-			and the element is a flex item
+			Force a <a>flex line</a> break before/after the element
+			if the element is a flex item
 			in a multi-line flex container.
 	</dl>
 
@@ -317,7 +316,7 @@ Line breaks within boxes: the 'wrap-inside' property</h3>
 	Name: wrap-inside
 	Value: auto | avoid
 	Initial: auto
-	Applies to: all elements
+	Applies to: <a>inline boxes</a>
 	Inherited: no
 	Percentages: n/a
 	Computed value: as specified