[gnome-user-docs] files-preview: Key label in upper-case

[Rafael Fontenelle <rafaelff src gnome org>]

commit fea1e80e6ca900af7fc92f63721bc966bf4f5779
Author: Rafael Fontenelle <rafaelff gnome org>
Date:   Mon Aug 1 18:19:28 2016 -0300

    files-preview: Key label in upper-case

 gnome-help/C/files-preview.page |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/gnome-help/C/files-preview.page b/gnome-help/C/files-preview.page
index 4ff31f4..3875d21 100644
--- a/gnome-help/C/files-preview.page
+++ b/gnome-help/C/files-preview.page
@@ -36,8 +36,8 @@ simple preview window. Press the space bar again to dismiss the preview.</p>
 video, and audio. In the preview, you can scroll through your documents or seek
 through your video and audio.</p>
 
-<p>To view a preview full-screen, press <key>f</key> or <key>F11</key>. Press
-<key>f</key> or <key>F11</key> again to leave full-screen, or press the space
+<p>To view a preview full-screen, press <key>F</key> or <key>F11</key>. Press
+<key>F</key> or <key>F11</key> again to leave full-screen, or press the space
 bar to exit the preview completely.</p>
 
 </page>