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node_modules/es5-ext/reg-exp/escape.js

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+// Thanks to Andrew Clover:
+// http://stackoverflow.com/questions/3561493
+// /is-there-a-regexp-escape-function-in-javascript
+
+"use strict";
+
+var re = /[-/\\^$*+?.()|[\]{}]/g;
+
+module.exports = function (str) {
+	return String(str).replace(re, "\\$&");
+};