Add example text for underline with special glyphs

Author: itsmeichigo

Example/Example/SampleContent/underline.html

@@ -4,3 +4,9 @@
 <p>Before link <a href="www.wordpress.com">Link&nbsp;to&nbsp;WordPress</a></p>
 <p>Before link <a href="www.jetpack.com">Link&nbsp;to&nbsp;Jetpack</a> After link</p>
 Link at end of text<a href="www.jetpack.com">Link&nbsp;to&nbsp;Jetpack</a>
+
+<!-- underline for special glyphs --->
+<a href="https://example.com/">&nbsp;قسم شنط &nbsp;الكايلي &nbsp;</a>
+
+<!-- link for image with special glyphs in title/alt/data-image-description --->
+<a href="https://www.wordpress.com/"><img class="alignnone wp-image-65" title="شنطة كايلي" src="https://www.wordpress.com/" alt="لوقو انستجرام" width="40" height="40" data-image-description="&lt;/p&gt; &lt;p&gt;لوقو انستجرام&lt;/p&gt; &lt;p&gt;" /></a>