* lib/rubygems: Update to RubyGems 2.1.3

Fixed installing platform gems

  Restored concurrent requires

  Fixed installing gems with extensions with --install-dir

  Fixed `gem fetch -v` to install the latest version

  Fixed installing gems with "./" in their files entries

* test/rubygems/test_gem_package.rb:  Tests for the above.

* NEWS:  Updated for RubyGems 2.1.3


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42938 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/rubygems/core_ext/kernel_require.rb

@@ -48,12 +48,7 @@ module Kernel
     # normal require handle loading a gem from the rescue below.
 
     if Gem::Specification.unresolved_deps.empty? then
-      begin
-        RUBYGEMS_ACTIVATION_MONITOR.exit
-        return gem_original_require(path)
-      ensure
-        RUBYGEMS_ACTIVATION_MONITOR.enter
-      end
+      return gem_original_require(path)
     end
 
     # If +path+ is for a gem that has already been loaded, don't
@@ -62,16 +57,11 @@ module Kernel
     #--
     # TODO request access to the C implementation of this to speed up RubyGems
 
-    spec = Gem::Specification.stubs.find { |s|
+    spec = Gem::Specification.find { |s|
       s.activated? and s.contains_requirable_file? path
     }
 
-    begin
-      RUBYGEMS_ACTIVATION_MONITOR.exit
-      return gem_original_require(path)
-    ensure
-      RUBYGEMS_ACTIVATION_MONITOR.enter
-    end if spec
+    return gem_original_require(path) if spec
 
     # Attempt to find +path+ in any unresolved gems...
 
@@ -119,21 +109,11 @@ module Kernel
       valid.activate
     end
 
-    begin
-      RUBYGEMS_ACTIVATION_MONITOR.exit
-      return gem_original_require(path)
-    ensure
-      RUBYGEMS_ACTIVATION_MONITOR.enter
-    end
+    gem_original_require path
   rescue LoadError => load_error
     if load_error.message.start_with?("Could not find") or
         (load_error.message.end_with?(path) and Gem.try_activate(path)) then
-      begin
-        RUBYGEMS_ACTIVATION_MONITOR.exit
-        return gem_original_require(path)
-      ensure
-        RUBYGEMS_ACTIVATION_MONITOR.enter
-      end
+      return gem_original_require(path)
     end
 
     raise load_error