Use a different list separator based on locale #889
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christianp
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Sep 29, 2022
The symbol used to separate items in a list, such as the arguments of a function or elements of a set, is now localised in LaTeX. For locales where the decimal separator is a comma, a semicolon is used as the list separator. Fixes #889 It became apparent that when you render a number in LaTeX, a comma needs not to have space around it. This commit splits the number notation style format method into two versions, for plain text and LaTeX. Numbas.math.niceNumber takes a `syntax` option to specify which version to use, and `scientificStyle` to specify the notation style used for the significand when `style = "scientific"`. The JME functions `formatnumber`, `dpformat` and `sigformat` need to work differently when the output is going to be used as LaTeX. There is already a `scientificnumberlatex` function for scientific notation, but I don't think this is the right approach now it's clear every notation style works differently in LaTeX. Could the `latex()` function set a `syntax` attribute on the scope while it evaluates its argument, so that it gets passed through to `niceNumber` whenever it's used?
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In locales where a comma is the decimal separator, it's not appropriate to use a comma to separate items in a list.
There doesn't seem to be a single widely-used convention for what to use instead (see https://whystartat.xyz/wiki/Separating_arguments_of_a_function), but I think a semicolon would be acceptable.
LaTeX and JME renderings should be handled differently - it would be very difficult to manage producing and evaluating different JME code based on locale.
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