From acba0b2328dacf1eb6d6d0b8a80eb02809527cfe Mon Sep 17 00:00:00 2001
From: Anton Vakhrushev <a.vakhrushev@elama.ru>
Date: Tue, 8 Oct 2019 17:03:24 +0300
Subject: [PATCH] Use constant for clear screen esc code

---
 src/expansion.cr | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/src/expansion.cr b/src/expansion.cr
index 45dedec..24b01fa 100644
--- a/src/expansion.cr
+++ b/src/expansion.cr
@@ -113,7 +113,9 @@ def normalize_command(cmd)
   cmd.downcase.gsub(/\s+/, ' ').strip
 end
 
-printf "\u{001b}[2J"
+CLEAR_SCREEN_ESC_CODE = "\u{001b}[2J"
+
+printf CLEAR_SCREEN_ESC_CODE
 loop do
   render_world world
   printf "In > "
@@ -122,7 +124,7 @@ loop do
   if norm == "exit"
     break
   end
-  printf "\u{001b}[2J"
+  printf CLEAR_SCREEN_ESC_CODE
   current_time = Time.local.to_unix
   world.run current_time
   begin