[vte] docs: boxes: Add some more tests

[Christian Persch <chpe src gnome org>]

commit 538e6a4c7bf67aac7cad9a3b3fe7edef97680429
Author: Christian Persch <chpe gnome org>
Date:   Sun Feb 5 20:35:47 2017 +0100

    docs: boxes: Add some more tests
    
    Add shades test from bug #778122, and flesh out the diagnoals section.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=778122

 doc/boxes.txt |   19 +++++++++++++++++--
 1 files changed, 17 insertions(+), 2 deletions(-)
---
diff --git a/doc/boxes.txt b/doc/boxes.txt
index cb2df8c..3b743dc 100644
--- a/doc/boxes.txt
+++ b/doc/boxes.txt
@@ -116,8 +116,14 @@ Rounded.
 │ │
 ╰─╯
 
-Other.
-╲ ╳ ╱
+Diagonals.
+╲     ╱ ╲     ╱          ╳     ╳          ╲ ╱ ╲ ╱ ╲ ╱      ╳ ╳ ╳ ╳     ╳╳╳╳╳╳╳
+ ╲   ╱   ╲   ╱      ╲   ╱ ╲   ╱ ╲   ╱      ╳   ╳   ╳      ╳ ╳ ╳ ╳ ╳    ╳╳╳╳╳╳╳
+  ╲ ╱     ╲ ╱        ╲ ╱   ╲ ╱   ╲ ╱      ╱ ╲ ╱ ╲ ╱ ╲      ╳ ╳ ╳ ╳     ╳╳╳╳╳╳╳
+   ╳       ╳          ╳     ╳     ╳      ╳   ╳   ╳   ╳    ╳ ╳ ╳ ╳ ╳    ╳╳╳╳╳╳╳
+  ╱ ╲     ╱ ╲        ╱ ╲   ╱ ╲   ╱ ╲      ╲ ╱ ╲ ╱ ╲ ╱      ╳ ╳ ╳ ╳     ╳╳╳╳╳╳╳
+ ╱   ╲   ╱   ╲      ╱   ╲ ╱   ╲ ╱   ╲      ╳   ╳   ╳      ╳ ╳ ╳ ╳ ╳
+╱     ╲ ╱     ╲          ╳     ╳          ╱ ╲ ╱ ╲ ╱ ╲      ╳ ╳ ╳ ╳ 
 
 Block elements.
 
@@ -137,6 +143,15 @@ Block elements.
 █▓▒░ ▕ ▏ ▐# ▌#
 
 
+Shades.
+
+                                ████████████████████████████████
+     ░░░░░     ▒▒▒▒▒     ▓▓▓▓▓  ██▓▓▓▓▓█████▒▒▒▒▒█████░░░░░█████
+  ░  ░░░░░  ▒  ▒▒▒▒▒  ▓  ▓▓▓▓▓  ██▓▓▓▓▓██▓██▒▒▒▒▒██▒██░░░░░██░██
+     ░░░░░     ▒▒▒▒▒     ▓▓▓▓▓  ██▓▓▓▓▓█████▒▒▒▒▒█████░░░░░█████
+                                ████████████████████████████████
+
+References:
 VT-102:  http://vt100.net/docs/vt102-ug/table5-13.html
 Unicode: http://www.unicode.org/charts/PDF/U2500.pdf
      and http://www.unicode.org/charts/PDF/U2580.pdf