Regarding your edit, it appears exactly the same :(. The browser collapses whitespace. I'm not sure if HN's comment system will allow you to double-space after a period, other than in a <pre> block:

    I live in the U.S. I am happy.

    I live in the U.S.  I am happy.

Ay, thanks.

British: I don't live in the US. I am happy.

Full stops aren't generally used in abbreviations here, Mx Cryptonector.

Though there's a more recent trend to write "Nato" rather than NATO, which annoys me for the inconsistency that arises. Plenty of people pronounce VAT as one word, or PAYE, but these are usually left in capitals.

Nato (but VAT) has been preferred by the Guardian style guide [0] for a long time. I've never understood it.

[0] https://www.theguardian.com/guardian-observer-style-guide-a

The Guardian also does eg and ie, which, equally, I've never understood.

As Churchill said, we're two cultures separated by a common language.

Your double space was collapsed by the browser.