[rubygems/rubygems] Remove now unnecessary dups

https://github.com/rubygems/rubygems/commit/56ce2a6445

lib/rubygems/basic_specification.rb

@@ -293,7 +293,7 @@ class Gem::BasicSpecification
       "lib" # default value for require_paths for bundler/inline
     end
 
-    "#{full_gem_path}/#{dirs}".dup
+    "#{full_gem_path}/#{dirs}"
   end
 
   ##

lib/rubygems/bundler_version_finder.rb

@@ -67,7 +67,7 @@ module Gem::BundlerVersionFinder
     lockfile = case gemfile
                when "gems.rb" then "gems.locked"
                else "#{gemfile}.lock"
-    end.dup
+    end
 
     return unless File.file?(lockfile)
 

lib/rubygems/config_file.rb

@@ -188,7 +188,7 @@ class Gem::ConfigFile
     operating_system_config = Marshal.load Marshal.dump(OPERATING_SYSTEM_DEFAULTS)
     platform_config = Marshal.load Marshal.dump(PLATFORM_DEFAULTS)
     system_config = load_file SYSTEM_WIDE_CONFIG_FILE
-    user_config = load_file config_file_name.dup
+    user_config = load_file config_file_name
 
     environment_config = (ENV["GEMRC"] || "").
       split(File::PATH_SEPARATOR).inject({}) do |result, file|

lib/rubygems/core_ext/kernel_require.rb

@@ -46,12 +46,11 @@ module Kernel
           load_path_check_index = Gem.load_path_insert_index - Gem.activated_gem_paths
           Gem.suffixes.find do |s|
             $LOAD_PATH[0...load_path_check_index].find do |lp|
-              safe_lp = lp.dup
+              if File.symlink? lp # for backward compatibility
-              if File.symlink? safe_lp # for backward compatibility
                 next
               end
 
-              full_path = File.expand_path(File.join(safe_lp, "#{path}#{s}"))
+              full_path = File.expand_path(File.join(lp, "#{path}#{s}"))
               rp = full_path if File.file?(full_path)
             end
           end

lib/rubygems/name_tuple.rb

@@ -51,7 +51,7 @@ class Gem::NameTuple
       "#{@name}-#{@version}"
     else
       "#{@name}-#{@version}-#{@platform}"
-    end.dup
+    end
   end
 
   ##

lib/rubygems/path_support.rb

@@ -47,8 +47,6 @@ class Gem::PathSupport
     @path = split_gem_path env["GEM_PATH"], @home
 
     @spec_cache_dir = env["GEM_SPEC_CACHE"] || Gem.default_spec_cache_dir
-
-    @spec_cache_dir = @spec_cache_dir.dup
   end
 
   private

lib/rubygems/request_set.rb

@@ -324,7 +324,7 @@ class Gem::RequestSet
 
     @git_set.root_dir = @install_dir
 
-    lock_file = "#{File.expand_path(path)}.lock".dup
+    lock_file = "#{File.expand_path(path)}.lock"
     begin
       tokenizer = Gem::RequestSet::Lockfile::Tokenizer.from_file lock_file
       parser = tokenizer.make_parser self, []

lib/rubygems/specification.rb

@@ -969,7 +969,7 @@ class Gem::Specification < Gem::BasicSpecification
 
   def self.dirs
     @@dirs ||= Gem.path.collect do |dir|
-      File.join dir.dup, "specifications"
+      File.join dir, "specifications"
     end
   end
 
@@ -1162,7 +1162,6 @@ class Gem::Specification < Gem::BasicSpecification
     spec = @load_cache_mutex.synchronize { @load_cache[file] }
     return spec if spec
 
-    file = file.dup
     return unless File.file?(file)
 
     code = Gem.open_file(file, "r:UTF-8:-", &:read)