[gtk+] gtk3-demo: Fix some css warnings

[Matthias Clasen <matthiasc src gnome org>]

commit d36f866b27e148bfdcd88fcd27c3a2f03a5157a5
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon May 30 16:07:52 2016 -0400

    gtk3-demo: Fix some css warnings
    
    Update the font: syntax to follow css.

 demos/gtk-demo/css_accordion.css |    2 +-
 demos/gtk-demo/cssview.css       |    2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/demos/gtk-demo/css_accordion.css b/demos/gtk-demo/css_accordion.css
index ef28451..ce3346d 100644
--- a/demos/gtk-demo/css_accordion.css
+++ b/demos/gtk-demo/css_accordion.css
@@ -4,7 +4,7 @@
     transition-property: color, background-color, border-color, background-image, padding, border-width;
     transition-duration: 1s;
 
-    font: Cantarell 20px;
+    font: 20px Cantarell;
 }
 
 window {
diff --git a/demos/gtk-demo/cssview.css b/demos/gtk-demo/cssview.css
index a3675c9..c4fe5ee 100644
--- a/demos/gtk-demo/cssview.css
+++ b/demos/gtk-demo/cssview.css
@@ -1,7 +1,7 @@
 /* Make the text editor has a nice style */
 .view {
   color: #2e3436;
-  font: Monospace;
+  font-family: Monospace;
   background-color: alpha(white, 0.30);
 }