change highlighter to "rouge"

[neelance]

See https://help.github.com/articles/page-build-failed-config-file-error/#fixing-highlighting-errors

[dmitshur]

Hmm.

The email I got said:

The page build completed successfully, but returned the following warning:

You are currently using the 'redcarpet' Markdown engine, which will not be supported on GitHub Pages after May 1st. At that time, your site will use 'kramdown' for markdown rendering instead. To suppress this warning, remove the 'markdown' setting in your site's '_config.yml' file and confirm your site renders as expected. For more information, see https://help.github.com/articles/updating-your-markdown-processor-to-kramdown.

GitHub Pages was recently upgraded to Jekyll 3.0. It may help to confirm you're using the correct dependencies:

https://github.com/blog/2100-github-pages-now-faster-and-simpler-with-jekyll-3-0

For information on troubleshooting Jekyll see:

https://help.github.com/articles/troubleshooting-jekyll-builds

If you have any questions you can contact us by replying to this email.

Which makes it sound like the markdown: redcarpet line is the problem, and removing it should fix things.

What makes you think the highlighter is the problem?

[dmitshur]

I mean, if you're confident, you're welcome to try it. I don't think these changes need to go through PRs, just make sure the end result works and there are no more warnings. :) LGTM if you want to proceed.

[neelance]

I got this mail:

The page build completed successfully, but returned the following warning:

You are attempting to use the 'pygments' highlighter, which is currently unsupported on GitHub Pages. Your site will use 'rouge' for highlighting instead. To suppress this warning, change the 'highlighter' value to 'rouge' in your '_config.yml'. For more information, see https://help.github.com/articles/page-build-failed-config-file-error/#fixing-highlighting-errors.

GitHub Pages was recently upgraded to Jekyll 3.0. It may help to confirm you're using the correct dependencies:

https://github.com/blog/2100-github-pages-now-faster-and-simpler-with-jekyll-3-0

For information on troubleshooting Jekyll see:

https://help.github.com/articles/troubleshooting-jekyll-builds

If you have any questions you can contact us by replying to this email.

The redcarpet seems to be another issue.