set encoding to ASCII for appropriate String#unpack modifiers
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37269 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
set encoding to ASCII for appropriate String#unpack modifiers
'H','h','B' and 'B' modifiers to US-ASCII.
[ruby-core:47653][Bug #7050]
from tenderlove. [ruby-core:46792][Bug #6799]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@37269 b2dd03c8-39d4-4d8f-98ff-823fe69b080e