[gtk/gtk-demo-tweaks: 5/9] gtk-demo: Add overline to the markup demo

[Matthias Clasen <matthiasc src gnome org>]

commit e35c0e043e1e0c3accc614504c00defa62da3869
Author: Matthias Clasen <mclasen redhat com>
Date:   Sat Jun 6 21:38:31 2020 -0400

    gtk-demo: Add overline to the markup demo
    
    This is a new-ish Pango feature.

 demos/gtk-demo/markup.txt | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/demos/gtk-demo/markup.txt b/demos/gtk-demo/markup.txt
index e5e7ea67d0..79b857f295 100644
--- a/demos/gtk-demo/markup.txt
+++ b/demos/gtk-demo/markup.txt
@@ -5,7 +5,7 @@ Text <span color="gray">c<span color="green">o</span>l<span color="tomato">o</sp
 
 Colorful <span underline="low" underline-color="blue"><span underline="double" 
underline-color="red">under</span>lines</span> and <span background="pink"><span 
underline="error">mo</span><span underline="error" underline-color="green">re</span></span>
 
-Colorful <span strikethrough="true" strikethrough-color="magenta">strikethroughs</span>
+Colorful <span strikethrough="true" strikethrough-color="magenta">strikethroughs</span> and <span 
overline="single" overline_color="green">overlines</span>
 
 Superscripts and subscripts: 𝜀<span rise="-6000" size="x-small" font_desc="italic">0</span> = 𝜔<span 
rise="8000" size="smaller">𝜔<span rise="14000" size="smaller">𝜔<span rise="20000">.<span rise="23000">.<span 
rise="26000">.</span></span></span></span></span>