add missing options to call-seq of IO#read_nonblock
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52914 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
add missing options to call-seq of IO#read_nonblock
call-seq. [ruby-core:71627] [Bug #11730]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@52914 b2dd03c8-39d4-4d8f-98ff-823fe69b080e