merge revision(s) 60059: [Backport #13949]
pack.c: unpack "M" may be ASCII only * pack.c (pack_unpack_internal): set ASCII only properly on "M", may be ASCII only. [ruby-core:83055] [Bug #13949]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@62138 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 60059: [Backport #13949]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_2_3@62138 b2dd03c8-39d4-4d8f-98ff-823fe69b080e