[ruby/rubygems] Prefer require_relative for internal requires

https://github.com/rubygems/rubygems/commit/51796f257a

lib/rubygems/commands/setup_command.rb

@@ -606,7 +606,7 @@ abort "#{deprecation_message}"
   end
 
   def regenerate_plugins
-    require "rubygems/commands/pristine_command"
+    require_relative "pristine_command"
     say "Regenerating plugins"
 
     args = %w[--all --only-plugins --silent]

lib/rubygems/query_utils.rb

@@ -1,9 +1,9 @@
 # frozen_string_literal: true
 
-require 'rubygems/local_remote_options'
-require 'rubygems/spec_fetcher'
-require 'rubygems/version_option'
-require 'rubygems/text'
+require_relative 'local_remote_options'
+require_relative 'spec_fetcher'
+require_relative 'version_option'
+require_relative 'text'
 
 module Gem::QueryUtils
 

lib/rubygems/remote_fetcher.rb

@@ -72,7 +72,7 @@ class Gem::RemoteFetcher
   #            fetching the gem.
 
   def initialize(proxy=nil, dns=nil, headers={})
-    require 'rubygems/core_ext/tcpsocket_init' if Gem.configuration.ipv4_fallback_enabled
+    require_relative 'core_ext/tcpsocket_init' if Gem.configuration.ipv4_fallback_enabled
     require 'net/http'
     require 'stringio'
     require 'uri'

lib/rubygems/s3_uri_signer.rb

@@ -1,5 +1,5 @@
 require 'digest'
-require 'rubygems/openssl'
+require_relative 'openssl'
 
 ##
 # S3URISigner implements AWS SigV4 for S3 Source to avoid a dependency on the aws-sdk-* gems
@@ -140,8 +140,8 @@ class Gem::S3URISigner
 
   def ec2_metadata_credentials_json
     require 'net/http'
-    require 'rubygems/request'
-    require 'rubygems/request/connection_pools'
+    require_relative 'request'
+    require_relative 'request/connection_pools'
     require 'json'
 
     iam_info = ec2_metadata_request(EC2_IAM_INFO)

lib/rubygems/source.rb

@@ -1,6 +1,6 @@
 # frozen_string_literal: true
 
-require "rubygems/text"
+require_relative "text"
 ##
 # A Source knows how to list and fetch gems from a RubyGems marshal index.
 #

lib/rubygems/util.rb

@@ -1,5 +1,5 @@
 # frozen_string_literal: true
-require 'rubygems/deprecate'
+require_relative 'deprecate'
 
 ##
 # This module contains various utility methods as module methods.