Commits on Mar 8, 2024

1. rdoc version lock is required …

   Some features of irb do not work properly when using the old rdoc.
   I have compared several major versions and found that it works as intended from 4.0.0.
   
   This problem occurs when there is a Gemfile.lock is installed with the old rdoc.
   I don't know why this Gemfile.lock installs an older rdoc than the ruby bundled rdoc,
   but specifying the version in the gemspec will at least prevent the problem.
   
   NOTE: ruby#704 problem does not occur with this change.
   
   The following is test code.
   
   ```
    ### Usage: ruby __FILE__.rb
    # # input RDoc and Tab
    # >> RDoc<Tab>
    #
    ### Expect: Display document of RDoc
    ### Actual: <internal:marshal>:34:in `load': instance of RDoc::Constant needs to have method `marshal_load' (TypeError)
   require "bundler/inline"
   
   gemfile(true) do
     source "https://rubygems.org"
   
     git_source(:github) { |repo| "https://github.com/#{repo}.git" }
     gem 'irb'
     # gem 'rdoc', '~> 4.0.0'
     gem 'rdoc', '~> 3.12.0'
   end
   
   require 'rdoc'
   require 'irb'
   
   IRB.start
   ```

   

   alpaca-tc committed Mar 8, 2024
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