Add validator to catch unnecessary link text like 'Visit xxx'
Add validator to catch 'More' links
Add validator to catch typing in all caps
Add validator to catch URLs being used as link text
Remove empty tags left by TinyMCE
Remove non-breaking spaces
Remove target attribute
Strip tags missing their required attributes
Correct casing of common words and phrases
Move fullstops outside links
Add logic from smartquotes.js to convert dumb quotes to smart quotes
Use en-dashes rather than hyphens when appropriate
Move spaces outside the end of links
Ensure headings start with a capital letter
Use correct ellipsis character