workaround markdown quote issue (#223)

css/reveal.css

@@ -238,6 +238,10 @@ body {
 	background: rgba(255, 255, 255, 0.05);
 	box-shadow: 0px 0px 2px rgba(0,0,0,0.2);
 }
+	.reveal blockquote p:first-child,
+	.reveal blockquote p:last-child {
+		display: inline-block;
+	}
 	.reveal blockquote:before {
 		content: '\201C';
 	}