_config.yml

markdown: kramdown
# !github-pages! mandatory › https://help.github.com/articles/using-jekyll-with-pages/#configuration-settings-you-cannot-change
# Since Jekyll 3 the default highlighter is Rouge (replaced Pygments.rb in v44)
highlighter: rouge


    
# More › http://kramdown.gettalong.org/quickref.html 
# Options › http://kramdown.gettalong.org/options.html 
kramdown: 
  input:          GFM 
  # https://github.com/jekyll/jekyll/pull/4090 
  syntax_highlighter: rouge 
 
  # Rouge Highlighter in Kramdown › http://kramdown.gettalong.org/syntax_highlighter/rouge.html 
  # span, block element options fall back to global 
  syntax_highlighter_opts: 
    # Rouge Options › https://github.com/jneen/rouge#full-options 
    css_class: 'highlight' 
    #line_numbers: true # bad idea, spans don't need linenos and would inherit this option 
    span: 
      line_numbers: false 
    block: 
      line_numbers: true 
      start_line: 1