[css-text-4] Typo

Author: fantasai

css-text-4/Overview.bs

@@ -10538,7 +10538,7 @@ CJK Punctuation Spacing: the 'text-spacing-trim' property</h3>
 		<dt><dfn>space-first</dfn>
 		<dd>
 			Set <a>fullwidth opening punctuation</a> with full-width glyphs (spaced)
-			on the first line the [=block container=]
+			on the first line of the [=block container=]
 			and each line after a [=forced line break=].
 			Otherwise as ''text-spacing/normal''.