Reverting nobu's rubygems patch. It needs: 1) to have a test, 2) to be UTF8, and 3) to work on 1.8 (see Gem.read_binary). (It should also be submitted to the rubygems repo or tracker)

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@30598 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -24,12 +24,6 @@ Tue Jan 18 07:53:52 2011  Tanaka Akira  <akr@fsij.org>
 
 	* eval_intern.h: parenthesize macro arguments.
 
-Tue Jan 18 06:49:38 2011  Nobuyoshi Nakada  <nobu@ruby-lang.org>
-
-	* lib/rubygems/source_index.rb (Gem#load_specification): read in
-	  binary mode to get rid of failures caused by mismatch between
-	  default internal encoding and encoding comments.
-
 Tue Jan 18 04:42:44 2011  Aaron Patterson <aaron@tenderlovemaking.com>
 
 	* ext/psych/lib/psych/parser.rb (Mark): Adding a class to wrap

lib/rubygems/source_index.rb

@@ -85,7 +85,11 @@ class Gem::SourceIndex
     def load_specification(file_name)
       return nil unless file_name and File.exist? file_name
 
-      spec_code = File.binread(file_name).untaint
+      spec_code = if defined? Encoding then
+                    File.read file_name, :encoding => 'UTF-8'
+                  else
+                    File.read file_name
+                  end.untaint
 
       begin
         gemspec = eval spec_code, binding, file_name