If you go to
https://pt.wikipedia.org/wiki/Especial:Entrar?uselang=pt
you'll notice the borders of the <div id="userloginForm"> and <div id="loginend"> are not left/right aligned.
This seems to be caused by the presence of "margin: .5em;" for "#userloginForm" but not for "#loginend".
Version: 1.21.x
Severity: enhancement
URL: https://pt.wikipedia.org/wiki/Especial:Entrar?uselang=pt