From c6255994faaa8c1a47bd716e38d1702ac17ad366 Mon Sep 17 00:00:00 2001
From: Vladislav Zarakovsky <vlad.zar@gmail.com>
Date: Wed, 11 Mar 2020 09:25:36 +0300
Subject: [PATCH] Remove the use of deprecated String#codepoint_at

`String#codepoint_at` is deprecated in Crystal https://github.com/crystal-lang/crystal/pull/8475 and to be removed in this PR https://github.com/crystal-lang/crystal/pull/8476
---
 src/keys.cr | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/keys.cr b/src/keys.cr
index 16ca24a..f79699f 100644
--- a/src/keys.cr
+++ b/src/keys.cr
@@ -146,7 +146,7 @@ module TermApp
         elsif s.size == 1 && s <= "\x1a"
           # ctrl+letter
           # TODO can't String.new from codepoint
-          name = (s.codepoint_at(0) + "a".codepoint_at(0) - 1).to_s # or .chr.to_s
+          name = (s.char_at(0).ord + "a".char_at(0).ord - 1).to_s # or .chr.to_s
           ctrl = true
 
         elsif s.size == 1 && s >= "a" && s <= "z"