blockquote>
<p>Later in the section it says:
<blockquote>
For other text layout purposes, e.g. emphasis marks, text-decoration, spacing, etc. the resulting composition is treated as a single glyph representing the Object Replacement Character U+FFFC.
</blockquote>
<p>So we need to test if user agents ignore spacing, emphasis marks, decorations applied to <em>each</em> character inside the composition but rather apply those effects to the resulting composition, treating as if it were a single characeter.
<p>