Move the entries of tempfile on docs

doc/maintainers.rdoc

@@ -85,8 +85,6 @@ Zachary Scott (zzak)
   Tanaka Akira (akr)
 [lib/shellwords.rb]
   Akinori MUSHA (knu)
-[lib/tmpdir.rb]
-  _unmaintained_
 [lib/time.rb]
   Tanaka Akira (akr)
 [lib/tsort.rb]
@@ -247,6 +245,9 @@ Zachary Scott (zzak)
   Keiju ISHITSUKA (keiju)
   https://github.com/ruby/thwait
   https://rubygems.org/gems/thwait
+[lib/tmpdir.rb]
+  _unmaintained_
+  https://github.com/ruby/tmpdir
 [lib/tracer.rb]
   Keiju ISHITSUKA (keiju)
   https://github.com/ruby/tracer

doc/standard_library.rdoc

@@ -32,7 +32,6 @@ SecureRandom:: Interface for secure random number generator
 Set:: Provides a class to deal with collections of unordered, unique values
 Shellwords:: Manipulates strings with word parsing rules of UNIX Bourne shell
 Time:: Extends the Time class with methods for parsing and conversion
-tmpdir.rb:: Extends the Dir class to manage the OS temporary file path
 TSort:: Topological sorting using Tarjan's algorithm
 un.rb:: Utilities to replace common UNIX commands
 
@@ -81,6 +80,7 @@ RDoc:: Produces HTML and command-line documentation for Ruby
 Singleton:: Implementation of the Singleton pattern for Ruby
 Tempfile:: A utility class for managing temporary files
 Timeout:: Auto-terminate potentially long-running operations in Ruby
+tmpdir.rb:: Extends the Dir class to manage the OS temporary file path
 Tracer:: Outputs a source level execution trace of a Ruby program
 URI:: A Ruby module providing support for Uniform Resource Identifiers
 WEBrick:: An HTTP server toolkit for Ruby