Merge pull request #575 from Alanocallaghan/patch-1

[cran-stringr]: https://cran.r-project.org/package=stringr

[dc-lessons]: http://www.datacarpentry.org/lessons/

[email]: mailto:team@carpentries.org

[github-importer]: https://import.github.com/

[github-importer]: https://import2.github.com/

[importer]: https://github.com/new/import

[jekyll-collection]: https://jekyllrb.com/docs/collections/

[jekyll-install]: https://jekyllrb.com/docs/installation/