1. The bullets itself are indented. This is ugly and rarely what you want but for some reason the default.
2. The bullets line up with the left edge of the rest of the content; the bulletpoint text is indented, naturally.
3. The bullets are hanging; the bulletpoint text lines up with other paragraphs, as recommended in the article.
If I rotate the device to landscape mode, then the page adds some margin and the bullets aren't clipped any more. I didn't look at the page source in detail - perhaps it is using some kind of media query on the width and reducing the left margin on a narrow screen.
I think the real lesson here is that many of these tricks to achieve some kind of "typographical correctness" are simply a bad idea. Users don't expect it, and it's very likely to break on some device you haven't tested.
People who view your page aren't looking for typographical correctness. They are looking for something easy to read that is familiar and comfortable and works on whatever device they happen to be using. The more tricks you put in, the less likely you are to achieve that.
And honestly, some of this just seems weird, even for print. I don't read much on paper any more, it's all phone/PC/Kindle. But I just thumbed through a bunch of my old books, and none of them follow the "correct" conventions. Bullet lists, (a) (b) (c) lists, and 1. 2. 3. lists are all indented much like the default web formatting. They don't outdent a quote mark at the beginning of a paragraph, the quote mark just appears in the first column like any other character.
I don't know where the author got these ideas about "correctness", because I sure don't see it in my professionally typeset books.
- print (not really applicable to the web) - projectors/TVs (my TV cuts off ~5% from each edge) - sticky notes on the edge of the monitor - anti-glare screen covers
It also feels cramped to read at the edge of the screen. I like having the negative space there to frame the text.
Exactly. For me, the indented list emphasizes the distinct structural entity, contrasting it against the bulk of the text. This makes lists easier to recognize (especially the short ones in narrow columns, like in your example) while previewing and skimming the reading material. You mention pattern recognition at the start of the article, and this is exactly the thing that makes pattern recognition easier, for me at least. And I would prefer “practically useful” over “typographically correct” every time :-).
That is a good guideline.
Compact text is a design decision, in many but not all cases, that is unrelated to wasting paper.