Improve code quality and write tests

node_modules/regjsgen/README.md

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+# regjsgen [![Build status](https://travis-ci.org/bnjmnt4n/regjsgen.svg?branch=master)](https://travis-ci.org/bnjmnt4n/regjsgen) [![Code coverage status](https://codecov.io/gh/bnjmnt4n/regjsgen/branch/master/graph/badge.svg)](https://codecov.io/gh/bnjmnt4n/regjsgen)
+
+Generate regular expressions from [regjsparser](https://github.com/jviereck/regjsparser)’s AST.
+
+## Installation
+
+```bash
+npm install --save regjsgen
+```
+
+## API
+
+### `regjsgen.generate(ast)`
+
+This function accepts an abstract syntax tree representing a regular expression, and returns the generated regular expression string.
+
+```js
+var regjsparser = require('regjsparser');
+var regjsgen = require('regjsgen');
+
+// Generate an AST with `regjsparser`.
+var ast = regjsparser.parse(regex);
+
+// Modify AST
+// …
+
+// Generate `RegExp` string with `regjsgen`.
+regex = regjsgen.generate(ast);
+```
+
+## Support
+
+Tested in Node.js 0.10, 0.12, 4, 6 and 8.