Merge pull request #355 from MitinPavel/gh-pages

Enable syntax highlighting of a CSS code block

Author: KimberleyCook

html/lesson3/tutorial.md

@@ -307,7 +307,7 @@ ul.social-media {
 
 Add a bottom border, to give the effect of a line, to the individual list items and tweak its dimensions
 
-```
+```css
 .social-media li {
   border-bottom: 1px solid #b0afc0;
   padding: 10px;