Extra vertical scroll bar

[bzaar]

http://gramdict.ru/howtouse#double-slash

[bzaar]

The culprit seems to be this bit of CSS which is part of our solution to the "Superscripts affect line height" problem (#59):

sub {
    top: 0.4em;
}

For superscripts, an elegant solution exists:

sup {
    vertical-align: top; // default is 'sup'
    font-size: 75%;
}

But we couldn't find an equivalent solution for sub.

Reducing top to 0.2em removes the extra scrollbar, at least for the current font family and size. We should watch out for a reappearance of this bug going forward.