Output.SortAttr TYPE: bool VERSION: 3.2.0 DEFAULT: false --DESCRIPTION--
  If true, HTML Purifier will sort attributes by name before writing them back
  to the document, converting a tag like: <el b="" a="" c="" />
  to <el a="" b="" c="" />. This is a workaround for
  a bug in FCKeditor which causes it to swap attributes order, adding noise
  to text diffs. If you're not seeing this bug, chances are, you don't need
  this directive.