User blog comment:Rappy 4187/Technical Update: June 18, 2013/@comment-1192804-20130618161855/@comment-126761-20130618184331

Hi. So far as we can tell, it is fixed. When making a section edit, it ensures there is a single linespace at the end of the section - we've compared this to 'pure' MediaWiki (e.g. Wikipedia), and this is how section edits behave there too.

The bug on Wikia, fixed, last week was that it was making two linespaces instead, which had a detrimental effect on page layouts.