[css-inline-3] Percentage line-height should not be scaled by text-fit (#13918)

Author: tkent-google

css-inline-3/Overview.bs

@@ -952,7 +952,7 @@ Line Spacing: the 'line-height' property</h3>
 	Initial: normal
 	Applies to: non-replaced inline boxes and SVG <a>text content elements</a>
 	Inherited: yes
-	Percentages: see below
+	Percentages: computed relative to ''1em''
 	Computed value: the specified keyword, a number, or a computed <<length>> value
 	Animation type: by computed value type
 	</pre>
@@ -990,8 +990,7 @@ Line Spacing: the 'line-height' property</h3>
 		<dt><dfn><<percentage [0,∞]>></dfn>
 		<dd>
 			The [=preferred line height=]
-			is this percentage of the element's used 'font-size'.
-			The [=computed value=] of the property
+			and [=computed value=] of the property
 			is this percentage of the element's computed 'font-size'.
 			Negative values are illegal.
 	</dl>