User blog comment:Kirkburn/Technical Update: March 3, 2015/@comment-452-20150303185952/@comment-126761-20150304144724

Hmm, I'm not sure what happened there. I will let the team know about the section edit/undo (etc.) edit summaries issue straight away.

I've fixed the typo - thanks.

Regarding the choice of link versus button for 'Show changes' - this was intentional. It's not a common link, and we don't want to go crazy with turning everything into buttons. As a link, it's less 'in your face' (similar to the template links further down the rail).