Fixed unnecessary margins on nested lists

[zzzzBov]

Some browsers remove top and bottom margins by default which enhances readability of nested lists.

[necolas]

I would expect

ul {
    margin: 1em 0;
}

to include margins on nested lists. Your code would have interfered with this author expectation if they tried to customise margins later in the stylesheet. So I've just normalized the left margin and left the vertical margins alone altogether. Thanks

[zzzzBov]

Good choice. I was a little concerned about the specificity of li ul, li ol getting in the way.

[zzzzBov]

I did some browser testing, and unfortunately IE statically defines margins on ul and ol, which means that a larger font-size will create differing margins in different browsers. I'd recommend just reverting back to margin: 1em 0; Devs can always add the sub-list fix manually afterwards.

[necolas]

@zzzzBov This should be fixed in the latest version of the file. Thanks for bringing up these issues