[gnome-user-docs] Fixed ratio char to right Unicode

[Marek Černocký <mcernocky src gnome org>]

commit e03a79feb365871fb3cd3e562d256a2209b4699a
Author: Marek Černocký <marek manet cz>
Date:   Sat Oct 24 21:47:07 2015 +0200

    Fixed ratio char to right Unicode

 gnome-help/C/look-resolution.page |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gnome-help/C/look-resolution.page b/gnome-help/C/look-resolution.page
index 29ccc4c..cb7bcb1 100644
--- a/gnome-help/C/look-resolution.page
+++ b/gnome-help/C/look-resolution.page
@@ -80,7 +80,7 @@
   <p>The resolution is the number of pixels (dots on the screen) in each
   direction that can be displayed. Each resolution has an <em>aspect
   ratio</em>, the ratio of the width to the height. Wide-screen displays use a
-  16:9 aspect ratio, while traditional displays use 4:3. If you choose a
+  16∶9 aspect ratio, while traditional displays use 4∶3. If you choose a
   resolution that does not match the aspect ratio of your display, the screen
   will be letterboxed to avoid distortion, by adding black bars to the top and
   bottom or both sides of the screen.</p>