Clearing up misconceptions about characters vs bytes in the manual

[Rob Hoelz <rob@...>]

Hi list,

A user came on the IRC channel today asking about Unicode support.
When I tried to explain that string.sub(2, 2) and io.read(1) wouldn't
work as expected on UTF-8 data by explaining that Lua only uses 8-bit
clean strings and doesn't understand UTF-8 data beyond a string of
bytes, the user pointed out that the manual speaks in terms of
characters, not bytes.

Would it be a good idea to make a distinction between characters and
bytes, or do you guys feel that this is already clear in the manual
(and PiL)?

-Rob

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