'use strict';
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module.exports = function (str) {
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if (typeof str !== 'string') {
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throw new TypeError('Expected a string');
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}
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var newlines = (str.match(/(?:\r?\n)/g) || []);
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if (newlines.length === 0) {
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return null;
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}
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var crlf = newlines.filter(function (el) {
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return el === '\r\n';
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}).length;
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var lf = newlines.length - crlf;
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return crlf > lf ? '\r\n' : '\n';
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};
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module.exports.graceful = function (str) {
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return module.exports(str) || '\n';
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};
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