Update call-seq of ARGF.read_nonblock
ARGF.read_nonblock supports `exception: false' like IO#read_nonblock since 2.3.0. [Feature #11358]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60401 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
Update call-seq of ARGF.read_nonblock
ARGF.read_nonblock supports `exception: false' like IO#read_nonblock
since 2.3.0.
[Feature #11358]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@60401 b2dd03c8-39d4-4d8f-98ff-823fe69b080e