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fixed 3277733 -- REGRESSION: \ in JavaScript mishandled when encoding is Japanese (istweb.apple.com)
This is the third time I've fixed handling of backslash and yen sign. Each time I fixed part
of the problem but either didn't fix the whole thing or caused a regression. This time I did
more experiments with other browsers, and I came to the conclusion that all other browsers keep
the backslash character internally unchanged, and only change to the yen sign when displaying
rather than decoding to the Unicode "yen sign" character. This makes the backslash character
different from any other, and requires special code, but it's the only way to match the other
browsers' behavior. This seems to work great; I retested all the backslash/yen bugs from the
past to make sure I didn't cause new regressions. The only loose end is the DOM API. It's not
clear whether the DOM API should return the strings with backslashes or with yen signs, but
we can probably ship 1.0 without getting that 100% right.
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