fix some font sizes

diff --git a/doc/tutorial/xcb.css b/doc/tutorial/xcb.css
index 460f27c..dd07232 100755 (executable)
--- a/doc/tutorial/xcb.css
+++ b/doc/tutorial/xcb.css
@@ -101,4 +101,3 @@ span.code
   font-family: monospace;
   font-size: 12px;
 }
-