/usr/share/javascript/prettify/lang-n.js is in libjs-prettify 2013.03.04+dfsg-4.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 | var a=null;
PR.registerLangHandler(PR.createSimpleLexer([["str",/^(?:\'(?:[^\\\'\r\n]|\\.)*\'|\"(?:[^\\\"\r\n]|\\.)*(?:\"|$))/,a,'"'],["com",/^#(?:(?:define|elif|else|endif|error|ifdef|include|ifndef|line|pragma|undef|warning)\b|[^\r\n]*)/,a,"#"],["pln",/^\s+/,a," \r\n\t\u00a0"]],[["str",/^@\"(?:[^\"]|\"\")*(?:\"|$)/,a],["str",/^<#(?:[^#>])*(?:#>|$)/,a],["str",/^<(?:(?:(?:\.\.\/)*|\/?)(?:[\w-]+(?:\/[\w-]+)+)?[\w-]+\.h|[a-z]\w*)>/,a],["com",/^\/\/[^\r\n]*/,a],
["com",/^\/\*[\s\S]*?(?:\*\/|$)/,a],["kwd",RegExp("^(?:abstract|and|as|base|catch|class|def|delegate|enum|event|extern|false|finally|fun|implements|interface|internal|is|macro|match|matches|module|mutable|namespace|new|null|out|override|params|partial|private|protected|public|ref|sealed|static|struct|syntax|this|throw|true|try|type|typeof|using|variant|virtual|volatile|when|where|with|assert|assert2|async|break|checked|continue|do|else|ensures|for|foreach|if|late|lock|new|nolate|otherwise|regexp|repeat|requires|return|surroundwith|unchecked|unless|using|while|yield)\\b"),
a],["typ",/^(?:array|bool|byte|char|decimal|double|float|int|list|long|object|sbyte|short|string|ulong|uint|ufloat|ulong|ushort|void)\b/,a],["lit",/^@[a-z_$][a-z_$@0-9]*/i,a],["typ",/^@[A-Z]+[a-z][A-Za-z_$@0-9]*/,a],["pln",/^'?[A-Za-z_$][a-z_$@0-9]*/i,a],["lit",/^(?:0x[a-f0-9]+|(?:\d(?:_\d+)*\d*(?:\.\d*)?|\.\d\+)(?:e[+\-]?\d+)?)[a-z]*/i,a,"0123456789"],["pun",/^.[^\s\w\.$@\'\"\`\/\#]*/,a]]),["n","nemerle"]);
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