var makeString = require('./helper/makeString');
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var defaultToWhiteSpace = require('./helper/defaultToWhiteSpace');
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var nativeTrimRight = String.prototype.trimRight;
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module.exports = function rtrim(str, characters) {
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str = makeString(str);
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if (!characters && nativeTrimRight) return nativeTrimRight.call(str);
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characters = defaultToWhiteSpace(characters);
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return str.replace(new RegExp(characters + '+$'), '');
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};
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