[css-text-4] Make ideograph-alpha and ideograph-numeric spacing suggestions non-normative. #7050

Author: fantasai

css-text-4/Overview.bs

@@ -1914,18 +1914,14 @@ Character Class Spacing: the 'text-spacing' property</h3>
 
 		<dt><dfn>ideograph-alpha</dfn>
 		<dd>
-			Creates 1/4em extra spacing between runs of
+			Creates extra spacing between runs of
 			<a>ideographs</a> and <a>non-ideographic letters</a>.
 
-			Note: A commonly used algorithm for determining this behavior is specified in [[JLREQ]].
-
 		<dt><dfn>ideograph-numeric</dfn>
 		<dd>
-			Creates 1/4em extra spacing between runs of
+			Creates extra spacing between runs of
 			<a>ideographs</a> and <a>non-ideographic numerals</a> glyphs.
 
-			Note: A commonly used algorithm for determining this behavior is specified in [[JLREQ]].
-
 		<dt><dfn>punctuation</dfn>
 		<dd>
 			Creates extra non-breaking spacing around punctuation as required by language-specific typographic conventions.
@@ -2036,6 +2032,12 @@ Character Class Spacing: the 'text-spacing' property</h3>
 			in 3.8 Line Adjustment in [[JLREQ]].
 	</dl>
 
+	Note: A commonly used algorithm for ''ideograph-alpha'' and ''ideograph-numeric''
+	is specified in [[JLREQ]].
+	Spacing conventions vary, but values typically range from 1/4em to as low as 1/8em,
+	with 1/4em being particularly common in monospace contexts
+	and 1/6em being more common in proportional typesetting.
+
 	This property is additive with the 'word-spacing' and 'letter-spacing' properties.
 	That is, the amount of spacing contributed by the 'letter-spacing' setting (if any)
 	is added to the spacing created by 'text-spacing'.