## Submitting a Pull Request

1. [Fork the repository.][fork]
2. [Create a topic branch.][branch]
3. Check which version of Ruby is installed on your machine with `ruby -v`.
   The list of supported Ruby versions is listed in [.travis.yml][travis_yml].
   Set up one of these versions; use of [RVM][rvm] is recommended to switch
   easily between different versions.
4. [Install bundler.][bundler]
5. Make sure to have the `tidy` command on your system:

   * `apt-get install tidy`
   * `yum install tidy`
   * `pacman -S tidyhtml`

6. Check that unit tests pass with `rake test`.
7. Write a failing test to capture existing bug or lack of feature.
8. Run `rake test` to verify that test fails.
9. Implement your feature or bug fix.
10. Ensure tests pass.
11. If it's a new feature or a bug fix, please add an entry to the changelog file.
12. Add, commit, and push your changes.
13. [Submit a pull request.][pr]
14. You will get some feedback and may need to push additional commits
    with more fixes to the same branch; this will update your pull request
    automatically.

[branch]: http://git-scm.com/book/en/Git-Branching-Branching-Workflows#Topic-Branches
[bundler]: http://bundler.io
[fork]: https://help.github.com/articles/fork-a-repo
[pr]: https://help.github.com/articles/using-pull-requests
[rvm]: https://rvm.io
[travis_yml]: https://github.com/vmg/redcarpet/blob/master/.travis.yml