Adjust slide pre for contrast, bolder apperance

Author: jordanmccullough

_stylesheets/curriculum.scss

@@ -264,9 +264,12 @@ table{
 
 		pre{
 			width: 80%;
+			padding: 2em;
 			font-size: 120%;
 			text-align: left;
 			margin: 0 auto;
+			background: #222;
+			color: #f9f9f9;
 
 			code{
 				font-size: 1.5em;