Bullet List - Incorrect enumeration - list-style-type: lower-alpha; #1545
Description
At the end of the list "z" is replaced by "`" and the count restarts at "a" after "z" instead of moving on to "aa".
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
</head>
<body>
<ol style="list-style-type: lower-alpha;">
<li>correct</li>
<li>correct</li>
<li>correct</li>
<li>correct</li>
<li>correct</li>
<li>correct</li>
<li>correct</li>
<li>correct</li>
<li>correct</li>
<li>correct</li>
<li>correct</li>
<li>correct</li>
<li>correct</li>
<li>correct</li>
<li>correct</li>
<li>correct</li>
<li>correct</li>
<li>correct</li>
<li>correct</li>
<li>correct</li>
<li>correct</li>
<li>correct</li>
<li>correct</li>
<li>correct</li>
<li>correct</li>
<li>incorrect should be z</li>
<li>incorrect should be aa</li>
<li>incorrect should be ab</li>
<li>incorrect should be ac</li>
<li>incorrect should be ad</li>
</ol>
</body>
</html>