https://git.ruby-lang.org/ruby.git/commit/?id=5129ca3e05

From 5129ca3e056e1ce3189ba39fa311d4d687b97b45 Mon Sep 17 00:00:00 2001
From: Shugo Maeda <shugo@r...>
Date: Thu, 27 Oct 2022 10:29:02 +0900
Subject: [ruby/rdoc] Delay `require "readline"` in case the terminal is in raw
 mode

---
 lib/rdoc/ri/driver.rb | 9 ++++-----
 1 file changed, 4 insertions(+), 5 deletions(-)

diff --git a/lib/rdoc/ri/driver.rb b/lib/rdoc/ri/driver.rb
index d24f8d5eff..819cff8aa3 100644
--- a/lib/rdoc/ri/driver.rb
+++ b/lib/rdoc/ri/driver.rb
@@ -1,11 +1,6 @@ https://github.com/ruby/ruby/blob/trunk/lib/rdoc/ri/driver.rb#L1
 # frozen_string_literal: true
 require 'optparse'
 
-begin
-  require 'readline'
-rescue LoadError
-end
-
 require_relative '../../rdoc'
 
 require_relative 'formatter' # For RubyGems backwards compatibility
@@ -1079,6 +1074,10 @@ or the PAGER environment variable. https://github.com/ruby/ruby/blob/trunk/lib/rdoc/ri/driver.rb#L1074
   def interactive
     puts "\nEnter the method name you want to look up."
 
+    begin
+      require 'readline'
+    rescue LoadError
+    end
     if defined? Readline then
       Readline.completion_proc = method :complete
       puts "You can use tab to autocomplete."
-- 
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