Redmine

If Wiki diff has a new line (not a changed line), diff page may generates broken HTML like:

<div class="text-diff">
h1. CookBook documentation 
<br /> Some updated [[documentation]] here... <span class="diff_in">
<br /> More contents...&lt;/span&gt;
</div>

Close </span> tag is escaped.

For example:

Before

h1. CookBook documentation
Some updated [[documentation]] here...

After:

h1. CookBook documentation
Some updated [[documentation]] here...
More contents...

"More contents..." line is added. This case, diff page generates broken HTML.