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/usr/lib/nodejs/highlight/matlab.js is in node-highlight 7.4+ds-1.

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The actual contents of the file can be viewed below.

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module.exports = function(hljs) {

  var COMMON_CONTAINS = [
    hljs.C_NUMBER_MODE,
    {
      className: 'string',
      begin: '\'', end: '\'',
      contains: [hljs.BACKSLASH_ESCAPE, {begin: '\'\''}],
      relevance: 0
    }
  ];

  return {
    keywords: {
      keyword:
        'break case catch classdef continue else elseif end enumerated events for function ' +
        'global if methods otherwise parfor persistent properties return spmd switch try while',
      built_in:
        'sin sind sinh asin asind asinh cos cosd cosh acos acosd acosh tan tand tanh atan ' +
        'atand atan2 atanh sec secd sech asec asecd asech csc cscd csch acsc acscd acsch cot ' +
        'cotd coth acot acotd acoth hypot exp expm1 log log1p log10 log2 pow2 realpow reallog ' +
        'realsqrt sqrt nthroot nextpow2 abs angle complex conj imag real unwrap isreal ' +
        'cplxpair fix floor ceil round mod rem sign airy besselj bessely besselh besseli ' +
        'besselk beta betainc betaln ellipj ellipke erf erfc erfcx erfinv expint gamma ' +
        'gammainc gammaln psi legendre cross dot factor isprime primes gcd lcm rat rats perms ' +
        'nchoosek factorial cart2sph cart2pol pol2cart sph2cart hsv2rgb rgb2hsv zeros ones ' +
        'eye repmat rand randn linspace logspace freqspace meshgrid accumarray size length ' +
        'ndims numel disp isempty isequal isequalwithequalnans cat reshape diag blkdiag tril ' +
        'triu fliplr flipud flipdim rot90 find sub2ind ind2sub bsxfun ndgrid permute ipermute ' +
        'shiftdim circshift squeeze isscalar isvector ans eps realmax realmin pi i inf nan ' +
        'isnan isinf isfinite j why compan gallery hadamard hankel hilb invhilb magic pascal ' +
        'rosser toeplitz vander wilkinson'
    },
    illegal: '(//|"|#|/\\*|\\s+/\\w+)',
    contains: [
      {
        className: 'function',
        beginWithKeyword: true, end: '$',
        keywords: 'function',
        contains: [
          {
              className: 'title',
              begin: hljs.UNDERSCORE_IDENT_RE
          },
          {
              className: 'params',
              begin: '\\(', end: '\\)'
          },
          {
              className: 'params',
              begin: '\\[', end: '\\]'
          }
        ]
      },
      {
        className: 'transposed_variable',
        begin: '[a-zA-Z_][a-zA-Z_0-9]*(\'+[\\.\']*|[\\.\']+)', end: ''
      },
      {
        className: 'matrix',
        begin: '\\[', end: '\\]\'*[\\.\']*',
        contains: COMMON_CONTAINS
      },
      {
        className: 'cell',
        begin: '\\{', end: '\\}\'*[\\.\']*',
        contains: COMMON_CONTAINS
      },
      {
        className: 'comment',
        begin: '\\%', end: '$'
      }
    ].concat(COMMON_CONTAINS)
  };
};