[css-text-decor-4] Don't skip NNBSP. w3c#3393

Author: fantasai

css-text-decor-4/Overview.bs

@@ -997,35 +997,32 @@ Skipping Spaces: the 'text-decoration-skip-spaces' property</h4>
 	<dl dfn-type=value dfn-for=text-decoration-skip-spaces>
 		<dt><dfn>none</dfn></dt>
 		<dd>
-			Spaces are not skipped.
+			[=Spacers=] are not skipped.
 			They are decorated just like any other character.
 
 		<dt><dfn>all</dfn></dt>
 		<dd>
-			Skip all spaces,
-			i.e. all <a>typographic character units</a>
-			with the Unicode White_Space property [[UAX44]],
+			Skip all [=spacers=],
 			plus any adjacent 'letter-spacing' or 'word-spacing'.
 
 		<dt><dfn>start</dfn></dt>
 		<dd>
-			Skip all spaces,
-			i.e. all <a>typographic character units</a> with the Unicode White_Space property [[UAX44]]
-			and all <a href="https://www.w3.org/TR/css3-text/#word-separator">word separators</a>
+			Skip all [=spacers=],
 			plus any adjacent 'letter-spacing' or 'word-spacing',
 			when located at the start of the line.
 
 		<dt><dfn>end</dfn></dt>
 		<dd>
-			Skip all spacing,
-			i.e. all <a>typographic character units</a> with the Unicode White_Space property [[UAX44]]
-			and all <a href="https://www.w3.org/TR/css3-text/#word-separator">word separators</a>
+			Skip all [=spacers=],
 			plus any adjacent 'letter-spacing' or 'word-spacing',
 			when located at the end of the line.
 	</dl>
 
-	ISSUE: Should ''text-decoration-skip-spaces'' really skip all spaces?
-	Or should it only skip word-separators that are also spaces?
+	For the purpose of this property,
+	a <dfn>spacer</dfn> is
+	any <a>typographic character unit</a> with the Unicode White_Space property [[UAX44]]
+	except U+202F NARROW NO-BREAK SPACE,
+	or any <a href="https://www.w3.org/TR/css-text-3/#word-separator">word separator</a>.
 
 <h4 id="text-decoration-skip-ink-property">
 Skipping Glyphs: the 'text-decoration-skip-ink' property</h4>