TEST: Configure Pygments colorful style with new theme option

Author: mmcky

lectures/_config.yml

@@ -72,7 +72,9 @@ sphinx:
     html_favicon: _static/lectures-favicon.ico
     html_theme: quantecon_book_theme
     html_static_path: ['_static']
+    pygments_style: colorful
     html_theme_options:
+      qetheme_code_style: false
       authors:
         - name: Thomas J. Sargent
           url: http://www.tomsargent.com/