bug#53260: char-syntax differs in interpreter and bytecode

[Stefan Monnier]

> 1. Remove SETUP_BUFFER_SYNTAX_TABLE() from Fchar_syntax because as far as
> I can tell it has no effect at all.

Sounds good.

> 2. Remove make_char_multibyte(c) from Bchar_syntax because it seems to be
> the wrong thing to do: in a unibyte buffer, wouldn't the syntax table be
> indexed by byte value (so that char 255 in the buffer corresponds to entry
> 255 in the syntax table rather than entry 0x3fffff)?

Doesn't sound right: char tables are indexed by chars (i.e. Unicode code
points) not by bytes, so we need to convert the byte into a char
before indexing.

> 3. Now both implementations are identical. Replace the one in the byte-code
> interpreter with a call to Fchar_syntax.

Sounds good.


        Stefan