* lib/rubygems.rb, lib/rubygems/*, test/rubygems/*: Update rubygems-2.5.2.

  It supports to enable frozen string literal and add `--norc` option for
  disable to `.gemrc` configuration.
  See 2.5.2 release notes for other fixes and enhancements.
  https://github.com/rubygems/rubygems/blob/a8aa3bac723f045c52471c7b9328310a048561e0/History.txt#L3

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53707 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

10 files changed, 13 insertions, 14 deletions

diff --git a/lib/rubygems/package/digest_io.rb b/lib/rubygems/package/digest_io.rb
index 47f76ec10d..4930c9aa7d 100644
--- a/lib/rubygems/package/digest_io.rb
+++ b/lib/rubygems/package/digest_io.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 ##
 # IO wrapper that creates digests of contents written to the IO it wraps.
 
diff --git a/lib/rubygems/package/file_source.rb b/lib/rubygems/package/file_source.rb
index 4c2a7b9a4e..1a4dc4c824 100644
--- a/lib/rubygems/package/file_source.rb
+++ b/lib/rubygems/package/file_source.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 ##
 # The primary source of gems is a file on disk, including all usages
 # internal to rubygems.
diff --git a/lib/rubygems/package/io_source.rb b/lib/rubygems/package/io_source.rb
index 16a6e4be8b..ee79a21083 100644
--- a/lib/rubygems/package/io_source.rb
+++ b/lib/rubygems/package/io_source.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 ##
 # Supports reading and writing gems from/to a generic IO object.  This is
 # useful for other applications built on top of rubygems, such as
diff --git a/lib/rubygems/package/old.rb b/lib/rubygems/package/old.rb
index 1f1f33b856..5e722baa35 100644
--- a/lib/rubygems/package/old.rb
+++ b/lib/rubygems/package/old.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 #--
 # Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
 # All rights reserved.
@@ -64,7 +64,7 @@ class Gem::Package::Old < Gem::Package
 
         destination = install_location full_name, destination_dir
 
-        file_data = ''
+        file_data = String.new
 
         read_until_dashes io do |line|
           file_data << line
@@ -95,7 +95,7 @@ class Gem::Package::Old < Gem::Package
   # Reads the file list section from the old-format gem +io+
 
   def file_list io # :nodoc:
-    header = ''
+    header = String.new
 
     read_until_dashes io do |line|
       header << line
@@ -135,7 +135,7 @@ class Gem::Package::Old < Gem::Package
 
     return @spec if @spec
 
-    yaml = ''
+    yaml = String.new
 
     @gem.with_read_io do |io|
       skip_ruby io
@@ -176,4 +176,3 @@ class Gem::Package::Old < Gem::Package
   end
 
 end
-
diff --git a/lib/rubygems/package/source.rb b/lib/rubygems/package/source.rb
index 3dcce02a67..fe19776c38 100644
--- a/lib/rubygems/package/source.rb
+++ b/lib/rubygems/package/source.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 class Gem::Package::Source # :nodoc:
 end
 
diff --git a/lib/rubygems/package/tar_header.rb b/lib/rubygems/package/tar_header.rb
index 71529ee978..4aa45d78d7 100644
--- a/lib/rubygems/package/tar_header.rb
+++ b/lib/rubygems/package/tar_header.rb
@@ -1,5 +1,5 @@
+# frozen_string_literal: true
 # -*- coding: utf-8 -*-
-# frozen_string_literal: false
 #--
 # Copyright (C) 2004 Mauricio Julio Fernández Pradier
 # See LICENSE.txt for additional licensing information.
diff --git a/lib/rubygems/package/tar_reader.rb b/lib/rubygems/package/tar_reader.rb
index a1ea81cac4..d11bbe45f1 100644
--- a/lib/rubygems/package/tar_reader.rb
+++ b/lib/rubygems/package/tar_reader.rb
@@ -1,5 +1,5 @@
+# frozen_string_literal: true
 # -*- coding: utf-8 -*-
-# frozen_string_literal: false
 #--
 # Copyright (C) 2004 Mauricio Julio Fernández Pradier
 # See LICENSE.txt for additional licensing information.
diff --git a/lib/rubygems/package/tar_reader/entry.rb b/lib/rubygems/package/tar_reader/entry.rb
index 59d167ee8e..3c4f52747a 100644
--- a/lib/rubygems/package/tar_reader/entry.rb
+++ b/lib/rubygems/package/tar_reader/entry.rb
@@ -1,5 +1,5 @@
+# frozen_string_literal: true
 # -*- coding: utf-8 -*-
-# frozen_string_literal: false
 #++
 # Copyright (C) 2004 Mauricio Julio Fernández Pradier
 # See LICENSE.txt for additional licensing information.
diff --git a/lib/rubygems/package/tar_test_case.rb b/lib/rubygems/package/tar_test_case.rb
index 3e494e5594..46ac949587 100644
--- a/lib/rubygems/package/tar_test_case.rb
+++ b/lib/rubygems/package/tar_test_case.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: false
+# frozen_string_literal: true
 require 'rubygems/test_case'
 require 'rubygems/package'
 
diff --git a/lib/rubygems/package/tar_writer.rb b/lib/rubygems/package/tar_writer.rb
index 6f1aab47a1..43a6e01d22 100644
--- a/lib/rubygems/package/tar_writer.rb
+++ b/lib/rubygems/package/tar_writer.rb
@@ -1,5 +1,5 @@
+# frozen_string_literal: true
 # -*- coding: utf-8 -*-
-# frozen_string_literal: false
 #--
 # Copyright (C) 2004 Mauricio Julio Fernández Pradier
 # See LICENSE.txt for additional licensing information.