Disable Jekyll's default syntax highlighter Rouge

By default Jekyll have Rouge syntax highlighter. In some cases, you may want to disable it. To get Rouge disabled in Jekyll, just do the following.

• Open the _config.yml file located at the root directory.
• Add the following line:

highlighter: none

• To disable Rouge on website which are hosted on Github Pages add the following line:

markdown: kramdown
kramdown:
   syntax_highlighter_opts:
      disable : true