GeezerVison

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@codex review

Good catch, thanks — fixed in 17ba8ad.

The spec doesn't cap the number of hex digits inside \u{…}; it only requires the resulting value to be at most 0x10FFFF. So "\u{0000001}" is valid and yields code point 1, which the "1 to 6" wording wrongly rejected.

I dropped the digit-count clause altogether rather than saying "at most six significant digits" — the value range already carries all the information that matters:

X…XXXXXX must be a hexadecimal value between 0 and 10FFFF (the highest code point defined by Unicode).

Note the original text was inaccurate on a second count as well: it said "1 to 6 bytes", where the escape actually takes hex digits. That was the reason for this PR in the first place.

The same sentence in the Russian translation is updated in javascript-tutorial/ru.javascript.info#2175 to keep the two in sync.