[css-text-3] Emoji are Ambiguous as far as CSS is concerned.

Author: fantasai

css-text-3/Overview.bs

@@ -682,15 +682,18 @@ Characters and Letters</h3>
         <li>Otherwise, if the <a>East Asian Width property</a> [[!UAX11]] of both
           the character before and after the segment break is <code>F</code>,
           <code>W</code>, or <code>H</code> (not <code>A</code>),
-          and neither side is Hangul, then the segment break is removed.
+          and neither side is Hangul or Emoji (Unicode property <code>Emoji</code>),
+          then the segment break is removed.
         <li>Otherwise, if the <a>content language</a> of the <a>segment break</a>
           is Chinese, Japanese, or Yi,
           and the character before or after the segment break
           is punctuation or a symbol (Unicode <a>general category</a> P* or S*)
-          and has an <a>East Asian Width property</a> of <code>A</code>,
+          and has an <a>East Asian Width property</a> of <code>A</code>
+          or is Emoji,
           and the character on the other side of the segment break is
           <code>F</code>, <code>W</code>, or <code>H</code>,
-          and not Hangul, then the segment break is removed.
+          and not Hangul or Emoji,
+          then the segment break is removed.
         <li>Otherwise, the segment break is converted to a space (U+0020).
       </ul>