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Ignore braces in array preamble. (mathjax/MathJax#3565) #1508

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Ignore braces in array preamble. (mathjax/MathJax#3565) #1508

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4 changes: 4 additions & 0 deletions testsuite/tests/input/tex/Base.test.ts
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Original file line number Diff line number Diff line change
Expand Up @@ -4002,6 +4002,10 @@ describe('Complete Array', () => {
expect(tex2mml('\\begin{array}{> {x} c} X \\end{array}')).toMatchSnapshot();
});

it('column { }', () => {
expect(tex2mml('\\begin{array}{{c}} X \\end{array}')).toMatchSnapshot();
});

it('BadPreamToken', () => {
expectTexError('\\begin{array}a').toBe('Illegal pream-token (a)');
});
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12 changes: 12 additions & 0 deletions testsuite/tests/input/tex/__snapshots__/Base.test.ts.snap
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Expand Up @@ -1872,6 +1872,18 @@ exports[`Complete Array column @ p m 1`] = `
</math>"
`;

exports[`Complete Array column { } 1`] = `
"<math xmlns="http://www.w3.org/1998/Math/MathML" data-latex="\\begin{array}{{c}} X \\end{array}" display="block">
<mtable columnspacing="1em" rowspacing="4pt" data-frame-styles="" framespacing=".5em .125em" data-latex="\\begin{array}{{c}} X \\end{array}">
<mtr data-latex="{{c}}">
<mtd>
<mi data-latex="X">X</mi>
</mtd>
</mtr>
</mtable>
</math>"
`;

exports[`Complete Array column b 1`] = `
"<math xmlns="http://www.w3.org/1998/Math/MathML" data-latex="\\begin{array}{b{1cm}b{1cm}b{1cm}}a &amp; b &amp;c\\\\ d &amp; e &amp; f\\end{array}" display="block">
<mtable columnspacing="1em" rowspacing="4pt" columnalign="left left left" columnwidth="1cm 1cm 1cm" data-frame-styles="" framespacing=".5em .125em" data-latex="\\text{f}\\end{array}">
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2 changes: 2 additions & 0 deletions ts/input/tex/ColumnParser.ts
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Expand Up @@ -94,6 +94,8 @@ export class ColumnParser {
// Ignored
//
' ': (_state) => {},
'{': (_state) => {},
'}': (_state) => {},
};

/**
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