From 58f6580e3fa59c98bea210852df5bab0a6f68a00 Mon Sep 17 00:00:00 2001
From: kojix2 <2xijok@gmail.com>
Date: Thu, 21 Jan 2021 18:23:01 +0900
Subject: [PATCH] Improved border desc

---
 lib/youplot/command/parser.rb | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/lib/youplot/command/parser.rb b/lib/youplot/command/parser.rb
index 046989f..07b1d8f 100644
--- a/lib/youplot/command/parser.rb
+++ b/lib/youplot/command/parser.rb
@@ -70,7 +70,8 @@ module YouPlot
           parser.on('-h', '--height INT', Numeric, 'number of rows') do |v|
             params.height = v
           end
-          parser.on('-b', '--border STR', String, 'specify the style of the bounding box') do |v|
+          border_options = UnicodePlot::BORDER_MAP.keys.join(', ')
+          parser.on('-b', '--border STR', String, 'specify the style of the bounding box', "(#{border_options})") do |v|
             params.border = v.to_sym
           end
           parser.on('-m', '--margin INT', Numeric, 'number of spaces to the left of the plot') do |v|