Added cloneRegExp

snippets/cloneRegExp.md

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+### cloneRegExp
+
+Clones a regular expression.
+
+Use `new RegExp()`, `RegExp.source` and `RegExp.flags` to clone the given regular expression.
+
+```js
+const cloneRegExp = regExp => new RegExp(regExp.source, regExp.flags);
+```
+
+```js
+const regExp = /lorem ipsum/gi;
+const regExp2 = cloneRegExp(regExp); // /lorem ipsum/gi
+```