[css-text] (editorial) clarify what "general punctuation" refers to.

Closes w3c#3878

Author: frivoal

css-text-3/Overview.bs

@@ -3558,8 +3558,9 @@ Word Spacing: the 'word-spacing' property</h3>
       character has a zero advance width (such as the zero width space U+200B)
       then the user agent must not create an additional spacing between words.
 
-      General punctuation and fixed-width spaces (such as U+3000 and U+2000
-      through U+200A) are not considered word-separator characters.</p>
+      General punctuation (from U+2000 to U+206F)
+      and fixed-width spaces (such as U+3000 and U+2000 through U+200A)
+      are not considered word-separator characters.</p>
 
   <h3 id="letter-spacing-property" caniuse="css-letter-spacing" oldids="letter-spacing">
     Tracking: the 'letter-spacing' property</h3>