Import bigdecimal-1.4.0.pre-20181130a
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66124 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Import bigdecimal-1.4.0.pre-20181130a
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@66124 b2dd03c8-39d4-4d8f-98ff-823fe69b080e