merge revision(s) r42175:

	envutil.rb: encoding

	* test/ruby/envutil.rb (Test::Unit::Assertions#assert_separately):
  specify the encoding of source.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_0_0@45039 b2dd03c8-39d4-4d8f-98ff-823fe69b080e