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diff --git a/src/node_modules/es-abstract/2019/TimeString.js b/src/node_modules/es-abstract/2019/TimeString.js
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+'use strict';
+
+var GetIntrinsic = require('../GetIntrinsic');
+
+var $TypeError = GetIntrinsic('%TypeError%');
+
+var $isNaN = require('../helpers/isNaN');
+var padTimeComponent = require('../helpers/padTimeComponent');
+
+var HourFromTime = require('./HourFromTime');
+var MinFromTime = require('./MinFromTime');
+var SecFromTime = require('./SecFromTime');
+var Type = require('./Type');
+
+// https://www.ecma-international.org/ecma-262/9.0/#sec-timestring
+
+module.exports = function TimeString(tv) {
+ if (Type(tv) !== 'Number' || $isNaN(tv)) {
+ throw new $TypeError('Assertion failed: `tv` must be a non-NaN Number');
+ }
+ var hour = HourFromTime(tv);
+ var minute = MinFromTime(tv);
+ var second = SecFromTime(tv);
+ return padTimeComponent(hour) + ':' + padTimeComponent(minute) + ':' + padTimeComponent(second) + '\x20GMT';
+};