* lib/rake/file_list.rb (Rake::FileList#egrep): there is no need to
open files in binary mode.
see more details in https://github.com/jimweirich/rake/issues/74
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@34596 b2dd03c8-39d4-4d8f-98ff-823fe69b080e